I too have been having these issues. Quick rundown of symptoms:
Chronic inability to fall asleep / stay asleep (about 5 years) Recently prescribed Ambien and it helps knock me out, but I never feel well rested with or without the medication. The only way to explain it is that when I do "fall asleep" I am definitely not awake, but I am not getting restful sleep almost ever. I will also note that I am an extremely light sleeper, and it takes me hours to fall asleep almost every night.
Recently I have been experiencing the same symptoms as most of the other people here:
Since about a week ago, as I am just about to fall asleep, my heart starts racing, and pounding like my body just released adrenaline which startles me and wakes me up. Heart continues to pound while racing, slowly goes back to a normal rhythm (but I can still feel it pounding) and the cycle repeats.
I've tried to wait it out to no avail and will just lay there worried about what the hell is wrong with me. But it will continue until I break down and take an Ambien. The cycle continues until the Ambien knocks me out, and I wake up and feel like crap every morning.
I have had sleep studies, heart monitors, EKG's, ECG's, x-rays, and blood-work all done numerous times and they all point to me being perfectly healthy.
I have not really been able to sleep at all now for the last week and I finally went to urgent care with my heart racing and pounding out of my chest. They again did blood-work, put me on a heart monitor, did an EKG, and found nothing.
The Doc said it may be anxiety and prescribed me Xanax. I have never taken it before tonight, but I am cautiously optimistic. I have been seen so many times for these same symptoms, and been told there's nothing wrong with me so many times I am desperate to try anything.
It's funny too, because I have never had panic attacks, and to my knowledge have never had anxiety before (or maybe I have and it's just gone undiagnosed for years)....
In any case, as sad as it may seem to say this, it's nice not being the only person having these symptoms. I can relate to many of you, and I hope you all eventually find help....