JustAdam
Being 62 I expect mine to be a bit high and I have the option of adjusting my medication if I want to so you see I have an out you don't. Just knowing I can fix it helps. I used to do this with my Ativan when I was getting off it. I'd carry it and never take it. Just knowing it was there worked. Not relevant to you again but there must be something you can do that will say everything is okay. I'm claustrophobic in my mind, not actually. So thinking about tight spaces bothers me where actually being in them doesn't. My answer is to say over and over, "I would never do that". Sort of like a mantra. Like the time during a very bad spell of panic attacks at night, I said I'm sick of this, go away, I'm not doing this anymore. Surprisingly it worked. That is when I started to realize the problem was me, but why. At about this time My Therapist told me about associated memory being able to trigger unrelated things purely by stimulating anxiety memories. It works like this. An anxious thought gets your heart rate noticeable and memory associates it with a fear thought and it goes round and circle and ends back in memory so it can do it again. Here it gets complicated. Thinking about your heart could be a distraction from some other anxious thought. If so and what it is doesn't matter as much as having a coping skill to get your mind off it. One of these is acceptance. Saying "Oh here you are again, I know what you are, you can't hurt me". Like other exposures, do it enough and it becomes subconscious.
Another is distractions: Saying "Hmmmm, what did I miss to cause this". This one gets your mind elsewhere than the problem. Again, do it often enough and it becomes automatic and subconscious.
Like my claustrophobia (sort of) If I go find what triggered it I can laugh it off by saying "I would never do that".
I have another trick for claustrophobia but it is not relevant unless claustrophobia is a subconscious trigger for your blood pressure. It is visualization. In my case, it is thinking I'm smaller than I am and the space is bigger. Visualization can work for anything. You can use all three at the same time and others here may be able to add something to this.
Sunny gets by with acceptance and relaxation techniques where I get by with acceptance and aggression towards it. (telling it to get lost and out of my life)
If you can check your pulse and accept that it is related to blood pressure, which you know is normal except in your mind, would that work to calm you.
Obsession is like having a song stuck in your head. To get rid of it you think about a different one. Even if it is only mildly less obsessive.
I don't know what the answer is, only what works for me and I'm so glad I have something that does because frankly when I had panic attacks they were very scary.
Davit