Book Closed and Unfocused

201th post. I can't concentrate on Chap.2 notes for AP World..I'm going to just call that class APWH. Ugh. My head hurts and I'm tired....I don't know why, but nowadays...it seems like I'm not really sleeping. I would close my eyes, but then later...at like 1a.m., I would find my brain still working and there's like a headache cause it's not getting rest. My little sister has that problem too I think....she gets frustrated when she can't sleep like me...and then she kind of cries...I don't cry like her, but I do get frustrated. Couldn't sleep last night and woke up early...so ehh yeah. I'm so curious about what happened, but even if it's really bad...I'm prepared.