Emily - thanks for the tip that melatonin doesn't seem to help with staying asleep. THAT is my problem - I normally get to sleep pretty easily, it is the waking up ever 1 or 2 hours that is killing me. I DID just wake up twice last night though so perhaps forcing myself into deliberate sleep deprivation by going to bed later is helping with that, for now. Obviously that isn't a long-term solution and I suspect it will only work for so long anyway. I will check on the antihistimine, it is possible I am confusing that with something else.