Is my anxiety causing my high blood pressure and fear of heart attack?

I never realized this was OCD, but i constantly check my bp and i always have my fingers to my neck checking my pulse. I am terrified to die and Im scared to go to sleep at night because I feel like I won’t wake up. I also get really bad headache and feel like it’s a tumor. I feel like I’m going crazy

I had surgery a month ago and it re-triggered my heath anxiety really really bad. I keep getting intrusive thoughts about having heart attacks, blood clots or dying and it’s starting to feel really unmanageable again. This has happened before where I would go to the hospital a lot and was basically agoraphobic because I needed to be near a hospital and was afraid to leave the house. I’ve been having a lot of compulsions lately too through checking. I have a blood pressure machine and a pulsometer, and it’s gotten bad again to the point where I need to have them with me all the time and check my vitals regularly. It’s exhausting :/ I’ve been off my Prozac for 3 years now and really don’t want to go back on but I’m starting to think I won’t have a choice.

So I’ve been suffering with intense health anxiety for a few years now, and just recently I learned it may be caused by OCD. It’s to the point where every time I get a headache I start to freak out, scared that I could be having an aneurysm. I am far too worried about having a stroke or heart attack for being 21. I can’t even enjoy a casual, relaxing hot shower anymore. I have to slowly increase the temperature when getting in and slowly decrease the shower while getting out because I am afraid that any drastic temperature change can give me a heart attack. I know deep down that these fears are illogical, but no matter how often I get them they still feel just as real every time. I try to reason with myself, but every time I feel mild discomfort in my body I can’t help but freak out. I am so tired of checking my face in the mirror for symptoms of stroke every time I get a headache or feel a weird sensation in my body. Every other day of the week I force myself to stay awake for a certain period of time because I’m scared if I go to sleep I won’t wake up. I get hymnic jerks every single night (where you jolt awake when drifting to sleep) because my brain is so occupied with making sure I’m staying alive that it jolts me awake because my body is trying to sleep while my mind stays awake. It’s so difficult for me to pay attention during lectures because I get so caught up in my health anxiety that I’m focusing on grounding techniques in order to keep myself from hyperventilating. I spend more time making sure I can understand the words my professor is saying to make sure I’m not having a stroke than actually paying attention to the lectures. Another thing I struggle with is having to count my medication every time before I take it to make sure I didn’t accidentally take two or more doses, even if I KNOW I only took one. I have to count them anyways otherwise my mind will convince me I overdosed. It will not stop until I count my medication and make sure I didn’t overdose. It’s honestly so tiring, and the sad part is that my health anxiety has actually gotten better. It was even worse before now, and everything I’ve listed is stuff that I still do. Does anyone else have this struggle? Because it feels so isolating and makes me feel like I’m going crazy.