Hey Joey, Welcome back to HW. It is great to meet someone who is in the military. I think you have the hardest jobs of all...and wanted to take a moment to thank you.
I have the same problem you describe, trouble sleeping and waking up all different hours. I have taken Ambien which is okay but as you said it also knocked me out and still I was up a few hours later drunkenly wandering the house. I am taking Lunesta now and it has helped greatly. I don't know if the sleep problem is heart related/anxiety, that is an interesting angle to ponder. I am 32 never thought I would be in the position I am now...lol! I would defiantly follow up with the doc for your sleep. Let us know how it goes....Take care