early morning migraines

I'm new here so please bear with me.  Almost all of my migraines are present when I wake up in the morning.  I am currently taking 1000 mg of depakote/day for prevention purposes but I hate it due to the side effects (drowsiness, no energy, weight gain).  I rarely get a migraine during the middle of the day so I'm wondering if something is going on while I sleep.  I've tried different pillows, different sleeping positions etc.  Taking a med. for pain at the onset does nothing b/c when I wake up, I have a full blown attack going on with all the symptoms (light/noise sensitivity, vomitting, severe pain, diarrhea, etc etc) 

thanks for the reply Scorpio. I have a splint which I wear at night. I KNOW that I grind my teeth unfortunately. I do it during the day too and don't seem to be able to stop. I've been thinking of asking my doc. for a sleep aide, but then again, I don't want to have to rely on them. I thought if I had a more relaxing sleep, this may not happen.

In addition, I had a doc's appt. yesterday and decided I'm going to take a "medication vacation". I'll probably end up back on some sort of med. but I want to give it a whirl before switching to something else. The Depakote makes me feel sooooooo tired etc.