Based on the context and the answer, generate a question. 

Context: I did n't get to bed until 6:30 AM and kept waking up , finally getting out of bed at 10:30 . I drank so much coffee to stay awake last night I ' m still all twitchy . My mind is racing all over and my body struggles to keep up .

Answer:

I had to study .



What may be the reason I drank so much ?