Why am I having trouble sleeping?

Vixen3467
So I just started back at school Monday. Monday night I have to take an Advil pm and regular Advil for a migraine I have. I've been trying to sleep all tonight. I was sleeping fine until I woke up craving juice. Got up had some juice and am now laying in bed tired as hell but I can't sleep. What are some times to help me sleep better. I already feel like my body will crash soon which I know isn't good. Any tips advice or opinions extremely appreciated.
Why am I having trouble sleeping?
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