Hiya Ogarchamplin,
I know it is very hard to get past the thoughts that trigger our anxiety/panic. Though it is good to exercise to get the anxiety levels down, maybe it would be better for you to try something that will not put you aware as to what your heart rate is. Like maybe using the bicycle or something else that tickles your fancy. That way atleast, "the out of sight, out of mind" approach may kick in. That seems to work for me with everything. Usually if I am stressing over something or anxious about something I try to remove myself from what it is that causes these feelings. So then if I can not hear it or see it, I can usually cope much better. Just a thought for ya. Hopefully your meds will start to work soon to take the edge off. You are not going crazy, just reacting like we folks do to this disorder and it`s physical symptoms. Try to hang in there, it will get better.
Take care,
Diana xxxx
P.S. I don`t mean "REMOVE" yourself from something in the sense of stopping to do things that cause us to feel uncomfortable, but rather to find alternative things to do to get the relief we are seeking. I hope this makes sense.