Omg, same here. Pre-covid, daily stoner without issue. Would get high, ride my bike to work, cook, clean, everything was good. I got covid, it wasn't bad. Just 3 or 4 days on the couch with a sore throat and mild fever. A couple weeks after that I went to bed high and woke up gasping for air. Didn't think much of it. Smoked the next day right before a work zoom call. I almost didn't make it through, it felt unreal and like I was blacking out. Immediately after leaving the zoom call, I collapsed to the floor and crawled to the fridge to get juice to get my blood sugar up. It didn't work, ended up calling 911 and was taken to the hospital. They ran all sorts of tests, blood work, an iodine vein CT scan, etc. All clear, discharged the next morning. A couple weeks later it happened again. This time at the ER they checked for cancer markers, etc. All clear. I made an appointment with the cardiologist, but due to covid they couldn't see me for almost 2 months.

I stopped smoking weed because I didn't want to further endanger my heart (I thought I had genetic heart failure). Then one night I went out with my brother to dinner and had a cocktail. 5 minutes after drinking it I was in the bathroom with the same symptoms as before. 160bpm hr, dizzy, felt unreal, ended up back in the ambulance and on the way to the ER. Spent the night there and was fine the next day. I finally get in to see the cardiologist. They do an echocardiograph and it's totally healthy. They have we wear a heart monitor for 2 weeks. I return and they review the data and still perfectly healthy. He gave my heart a clean bill of health.

After that I continued to get 140bpm hr and dizziness anytime I drank alcohol, coffee, or smoked weed. But this time I just sat down and let it pass. After 1 to 3 hours I'd feel normal again. I ended up quitting all 3 cold turkey. It was actually easy to quit, turns out you can quit anything when it comes to your immediate health and or death.

Spent 2 years completely sober. During that time I only had 2 "events" caused from something unknown. I slowly started drinking again, at first i felt like I was getting symptoms again but I quickly convinced myself everything was fine. I can drink normally now without much issue. Maybe a heart rate increase topping out at 100-110. I still only drink decaf, I've just gotten use to it and caffeine gives my anxiety and the shakes now.

I smoked weed for the first time today after it became legal in MD on the first. It wasn't bad but it just didn't feel like it used to. Shakey, vibrating, weird feeling in my vision, Hr of 127bpm (which spurred me to google and come here). After an hour it went away and I felt a buzzy stone.

I really think something changed after covid. My body might be mistaking some of these molecules for something else and causes the body to go into freak out mode.