From one hypochondriac to another... go to the doctors! It is probably not as bad as you think and the panic attacks could be in part fuelled by your fear. And we all know there is only one way to overcome fear
I really feel for your situation Dave because it is not dissimilar to what mine was. I think even more essential than even the doctors is getting yourself some support. Family and friends are over rated even if you had them readily available. What you really need is support from other recovering alcoholics, whether that be here, AA, SMART meetings... Please don't try and do this alone. It is unnecessary and it really does help to have support. Both medically and emotionally x