Nightly Panic Attacks?

I posted a few weeks ago letting everyone know I was experiencing my third crash since removing my mirena back in Octomber '11. I've been having symptoms for about 4 weeks now and they have yet to let up. Same crappy symptoms as I've had the last two crashes. BUt this time the waking up at night with a racing heart ordeal seems to be worse than before. My body hurts all day and then I wake up just an hour or two after going to bed with a racing heart and feeling as if I'm having a heart attack and about to die. It's happened almost every night for the past 4 weeks. I've resisted going to the doctor this time around as I've done so 4 times before during my earlier crashes and each time am told "there is nothing wrong" or "you seem to be fine" and then sent out the door with a huge bill. I'm sure I've asked this before and had some of you ladies write me about it, but have any of you had this as one of your symptoms? I"ve read up on having panic attacks while sleeping but still dont know really what is causing it or why this is happening. And also, after the attack is over, I have a huge headache and my left arm is extremley sore. I dont know if this is from the racing heart or what but was hoping someone else maybe able to share their experience. My last crash lasted around 6 weeks, so I'm hoping in two weeks I can start to function normally again. Thanks so much ladies

Ashley Tweet