Exhausted and numb

There must be a new trend with my sleep habits.  Right after treatment, all I can do is sleep and the moment I start to feel better I begin to have interrupted nights of sleep.  The last couple of nights, since I started feeling better, I've been waking up at least once or more in the middle of the night; it always seems to be around the same times as well, usually around 2 and then again at 4; the night before last after waking at 4, I couldn't fall back asleep.  I think I was lucky to have gotten about 4 hours of sleep last night, I wish I could have an evening of at least 6-7 hours of uninterrupted sleep.  These past 2-3 days of sleep deprivation are taking their toll on me, I'm so exhausted and feeling so tired has made me numb to a lot.  All I've done since I got home is sit on my couch not thinking about much or caring about anything.  The only thing going through my mind right now is whether or not I'll be able to sleep through the night without getting up to see the clock tell me it's 2 AM.  Hopefully I'm so exhausted I'll sleep like a log and actually have the alarm go off for the first time in 3 days.