Answered your P.M., about this one, as most have said, let the doc work with you to figure this out. the sleep loss, and using a sleep aide is the thing I would want taken care of first. Getting some unassisted sleep is important for the body to heal, and to rebuild. It sounds like your doctor is trying to get to a root cause of what is happening to you, and not just doing the pop-a-pill-an-hour, routine.
Best of luck with sorting the problem out, keep us posted. More in my P.M.
Bill
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Semper Fi, USMC, 1975-1977
I Can Do All Things Through Him, Who Gives Me Strength. Philippians 4:13