I usually post in chronic pain but thought I would check this board out also. If I may offer an opinion here:
I would see a cardiologist. A Family physician or a GP cant really look into this the way a Cardio can. It also sounds like the anxiety/fear this is causing you is making it worse for you. For several years I had the heart pounding and racing but never really knew what it was. In 2001 I ended up in the ER in terrible pain & had to have emergency gall blader surgery. Anyway coming out of the anesthetic the recovery nurses didnt like my heart rhythyms as I was waking up. To make a long story short, I ended up having several tests by a cardiologist & now have a defibrilator. Apparently I am an anomaly. LOL
Anyway all that means is I am in the 30% of the population with no known heart conditions or problems that suddenly surface. Its not a pace-maker but if my heart rate goes screwy bad enough it will send an electric shock to regulate it. The theory behind putting it in was "its better to have it and NOT need it then to need it & NOT have it."
At first it was rather scary and I was afraid of doing much of anything. I remember I kept almost waiting for it to go off and every little thing that seemed out of place was so magnified, but after a couple of months I got to the point where it was on "ignore" and I started living my life again. All I mean by that is I was still aware of it, but didnt focus so totally on the defibrilator, if that makes any sense? I had to make a decision because being in the house, in a chair in my pj's WAITING for something to happen was NOT living. That was the fear.
My point is in the 5 years now that I've had it, its gone off once. This was about 2 years ago.
I have no idea what it felt like because I fainted. Since I have NEVER fainted in my life I had no idea what caused this. I do remember at that time I was under a whole LOT of stress. When I went in to have it read, (which you do every 3-6 months depending on your condition) the technician said "Wow, I see you had an episode" I was like really. He said yes, your HR went up to 300 BPM. If you hadnt had the defibrilator you probably would have died." I was like allrighty then!! LOL
I guess the point of this post is to tell you this: I know these things can be VERY scary, but you CAN'T let the fear overwhelm you. Be proactive and either make an appointment with a cardio DR -OR- get a refferal to one. Maybe if YOU are doing something about this, you will feel better and more in control. I know that's how it seems to work for me. That way you can find out whats going on in your body and put some of this fear to rest so it isnt so crippling. I really didnt mean to post a novel, but hope this information helps you.
dx: congenital spondylolisthesis L4, L5-S1, defibrilator (implanted 1/02)
rx: oxycodone 5/325, tramadol 300mg, tizanidine 4mg, cozaar 100mg