Low blood pressure + pot or other drugs + pot?

Hello! This is my first post here. I moreso frequent r/trees, if you know of it, but I wanted to post here for anonymities sake.
I'm going to write about my situation and hopefully someone out there has had the same experience or similar. I suppose I should go to a doctor, but I don't want to bring it up and have my insurance inadvertently canceled.

So I smoked everyday for about a year and a half up until August or September of last year. That's when I started to not enjoy the feeling I would get when high. I get a real uneasy feeling, I get really jittery and I feel like my heart beat is irregular and really slowed [I have rather low blood pressure to begin with and Afib runs in the family, so...]. I could especially get jittery when smoking around people I was not familiar with, but I guess I'd chalk that up to something of the panic attack sort, although I'd feel otherwise relaxed in the situation.

I'm afraid I might have triggered this and that really pisses me off. I don't know if it's possible [I read a Erowid experience where someone did coke and it fucked with their reaction to pot, so maybe the same thing happened.]. Around that time I was messing around with diphenhydramine, just out of convenience. I was very careful with it, taking under the recommended dose [according to Erowid] and gradually working up from there over the course of a few weeks. But one night I had a really bad "trip", if you will. I think it was mostly paranoia, but I was SO worried that my heart was stopping and starting. I forced myself to vomit and just chilled out until it was over, but after that I said "no more".

But ever since I can't even enjoy cannabis. [Though I can't really remember if my bad reaction to pot started before doing DPH, but I would say it got worse afterward] It really sucks. Since September I've only taken a few hits off a blunt and my roommates vape, and for most of those have led to me feeling really paranoid about the whole situation. Only once since did I have a relatively nice high. This really sucks, you guys! I love smoking and I miss it so much! Does anyone have any advice for me? Is there anything I can do to reset myself, so to speak?
Thank you for reading if you did get this far! lol

I demand the last 2 minutes of my life back!

Sorry :T

Hey the same thing happened to me! And ive been wondering the same thing, whether i will go back to enjoying weed without thinking im having a heart attack. Even after i took a few months off and took about 3 hits, which got me super stoned, but still made me feel uneasy. Im going to try it again in the near future. I hope its just something that goes away because i strongly agree in the power of cannabis.