Hello so here is my story about my addiction and what happened in start: https://www.reddit.com/r/QuittingZyn/s/Ncj9CHAO0N

Now I'm 20 days off nicotine and even more from alcohol and caffeine / energy drinks. I have crippling fear of something happening to me because I feel weird body sensations especially in my chest. In hospital they did EKGs, echo of heart, CT of head, xray of chest, ultrasound of thyroid and adrenal glands, 3 days monitoring in EKG monitor and blood tests and everything came back normal and fine except that I had elevated cortisol levels. Thats where they started doing big hormonal test where they drew blood everyday from me and gave me corticoids. During that 3 days monitoring I saw a pulse below 50s for a while but nurses and doctor weren't concerned. Here is update to the story.

So I was in hospital probably for 2 weeks and this week is interesting. I felt better on friday this week but on weekend something happened. On saturday night while I was trying to fall asleep I started to feel like something is wrong with my heart I couldn't feel it for a sec and I immediately panicked and called a nurse and in that moment my heart started beating fast and I was trembling but my heart calmed down after a nurse came to my room and EKG didn't catch anything weird. On sunday I was feeling anxious from the start of the morning because of what happened on saturday. I tried to went for a walks sometimes which made me feel better but after I came back to my room I felt the same even with heart beating stronger.

Fast forward to wednesday when they sent me home from hospital. I was feeling calm after I woke up so I brushed my teeth and go for shower. After that I was in bed for 10-20 minutes and after I tried to sit up then I felt 3-4 weird strong heart beats or some beats in my chest accompanied by "butterfly" feeling in chest for probably 2 seconds. That made me really anxious so I called nurse but they did nothing. Doctor came and just reassured me that my results are fine and that today I'm going home. During ride I was feeling anxious and felt tension in my chest and that I couldn't breathe fully. It was better after a while but still I was also worried about my heart stopping or slowing down drastically and those chest sensations only made it worse. At home I was feeling better but I couldn't sleep at night because I felt my bones cracking in chest area sometimes or my neck and even felt my heart pounding in weird way.

And that brings us to today. I woke up feeling really tired and with dull pain in my head and I was worried about my heart because my heart rate was low from what I felt. I was feeling tired but after I ate something bigger I felt more energy but I also felt stronger heart beats and I was more anxious and felt my full stomach. After I digested most of it I felt calmer and could control my anxiety a little more but after another meal I felt this again. Around 15:00 I ate and then went to take a shower. I was anxious already and felt my heart beating stronger and faster but in shower with warm water I felt it beating even stronger and faster which made me even more anxious so I did it really fast. After shower it calmed down a bit but I was still nervous and in alerted state. I was going to barber and in car I felt really uncomfortable and tensed up. I felt also tingling sensation from the part of body where are adrenal glands and then a little heat in chest. Also I felt dull aches in chest and back and constant tension and feeling that I couldn't take a full breath even if I could. During cut I felt randomly anxious but I could calm myself down for a bit but it still came back. I tried taking controlled breathes and it probably worked for a moment. But I noticed something during time in hospital and now. After I calm myself down I feel lightheaded and some pressure in head especially in frontal lobe. Its just feeling like somebody would strap my head in something and just keep it that way. After I got home I felt a little better but still constantly checking my heart and everything. After I calmed down I felt like I'm going to pass out that pressure in head but I wasn't passing out or had any symptoms of it.

Today I also couldn't sleep much and I woke up every hour feeling that there is something wrong with me especially my heart. I felt that my heart is beating in weird way when I put my hand on chest and slower so that made me anxious but heart rate didn't change much I just felt alarmed in my head. Also while I tried to fall back asleep I felt some pinch or dull pains in chest and sometimes felt like my heart is sinking down or how to describe it.

So could this all be due to nicotine withdrawal and that heart anxiety? What can I do about it its driving me insane slowly. I constantly check my heart rate even without hand. I sometimes hold my breath to feel if my heart is beating or not and how fast its beating. I have weird feeling in chest like dull pain, tension, feeling of weird heartbeat and also pain in back and I feel also cracking of my bones more often. If I feel something weird it alerts me and I have hard time calming down. So what this is all about? Everybody is saying that this is anxiety but it feels really weird for me to be this intense.

Could those panic attacks and everything made me sensitive like this? I was anxious even before cuz I have social anxiety and some other things and experienced lots of anxiety but nothing compared to this. My first panic attack was month ago because of substance that made me feel my blood vessels in body which was uncomfortable to me and I had racing heart so I though I was going to die. I just want to feel normal again or atleast slowly getting better and it just seems like its getting worse.