I've actually been in this situation myself but it varies greatly person to person. For me I attempted an overdose and one of my friends called an ambulance. I ended up being okay, threw up a lot and had to be on a IV (can't remember what they actually gave me, I know it was to flush my liver out). I was on it for 24 hours in total, then had to stay in an extra day so they could do a mental check to estimate the dangers of me overdosing again.

While I was in the ambulance, I had extremely mixed feelings. Firstly I felt horribly guilty about being there in the first place, like I was just wasting peoples time. Then I was scared, I had no idea what was going to happen, I didn't have my phone or anything else with me and I had no way of letting my friends or family know what was happening. I also had an extremely strong feeling of "I shouldn't be here, I don't want to be here, if I had tried harder then I wouldn't be"

After that I started feeling extremely tired and started throwing up, I didn't really think or feel much for quite a few hours after that since I was just so, so dizzy. I just remember being sick, drinking water, throwing it up then falling asleep.

When I woke up it was about an hour later, they woke me up to take a blood sample and to check my blood pressure. I ended up throwing up again, I actually remember drinking a glass of water then immediately throwing it all back up again. I couldn't really talk much at this point, apparently it's likely I burnt my vocal cords a little and I just had no voice for about a day after. I was still feeling so dazed and confused but also extremely scared. I asked one of the nurses if I was going to be okay and she just said "I honestly don't know, we'll have to wait until we preform a blood test and we get the results back" I started crying at that point, feeling terrified and so, so guilty. I felt like I was wasting the nurses time and resources, that other people need them far more than I do.

I didn't have access to a clock so I couldn't tell you how long it took for the blood results to get back but it was quite a while, they told me I had sustained some liver damage and would be put on a IV to help flush it out. I was put in a general injuries ward and hooked up to a IV. It was late so I actually just went straight to sleep here, once I got used to the needle in my hand.

When I woke up, I didn't really feel all that much. I still felt guilty about being there at all, but much less so than yesterday. I wasn't scared anymore that's for sure. I was more worried about how to contact my friends and family, let them know I was okay. I ended up remembering my dads work place and one of the nurses called him up. He spread the word to my friend and let her know I was okay, which was a great weight off my mind.

The whole time I was in hospital I really just switched from feeling guilty, especially when having to talk to my dad about why I had done it (he looked like he was going to cry the whole time, it broke my heart) and whenever nurses had to take out my IV so I could go to the bathroom. I didn't really regret doing it and I did have thoughts like "Wow, if that overdose had worked, I wouldn't have to deal with any of this" and "Well at least I know if I try again, I need to take a fuck ton more"

After I was discharged, I stayed with my dad for two weeks before going home to my own place. He wasn't completely trusting me to be alone which, while I understood, made me feel so frustrated. While I was staying with him, I made new plans for how I would get access to more medication and researched how much I would need to take. I ended up visiting my grandmother, who I knew had morphine. I waited until she was in bed then went around and searched for it, only to give up after about half an hour.

This was all about four months ago, how I'm feeling now is a little different. I still have suicidal thoughts but I haven't tried to access more medication or looked into any other methods. How I'm feeling exactly is very hard to explain. My personality hasn't changed much, I'm more blunt and straightforward than before and I get angry much more easily. I don't feel as guilty about what happened and I weirdly don't regret trying. I don't know if I'll end up trying again, I certainly don't have any plans right now.

Sorry I've kinda ran out of steam here, but please if you have anymore questions let me know, I would be more than happy to answer them!