For about 2.5 years now, I have experienced similar symptoms, hearing that I'm not the only one is reassuring. But I still worry.
I have a constant pounding pulse, my heart rate always seems ok, but very strong. I can feel it all over my body, prominently in my chest, stomach and neck. It rocks my body when sitting and standing and I can physically see my stomach and neck pulsing.
This is also accompanied with regular back and chest pains/aches. I've always had back issues and often think this may be the cause, nerve pressure or something.
I have had several tests, echocardiogram, stress test, ultrasound, holter monitor, EKG, blood tests, blood pressure etc, always coming back ok.
I'm always told it's anxiety, but even when I'm not as anxious about it all, it's always there. I do definitely feel that I have developed bad health anxiety over the last 4-5 years though. I constantly fear Im going to have a heart attack or something and hate being a far distance from a hospital or home, even though I haven't yet panicked myself into going to ER nor needed to go to the hospital or anything that drastic.
I do believe the doctors when I'm told the tests come back ok, but I can't help but think something is missed.
I can't remember the last time I've felt relaxed. If I try mindfulness excersises, all it does is make me even more aware of my pulse which also effects breathing excersises.
I find it particularly worse after eating or after standing up etc.
I take medication daily and I've tried psychologists a few times, but when I mention these physical symptoms they look confused and I feel like I'm the only one who suffers from them by their reaction.
It's effecting my every day life more and more as I avoid vigorous excersise and doing things I used to enjoy, particularly going away for holidays or camping, wakeboarding or just going to the gym. I worry that if I exacerbate the symptoms something will happen or I worry that if I'm away from home or work I won't have as easy access to medical services etc.
I know deep down this all sounds silly, but no matter what I tell myself or try to do, it's always a problem.