Yesterday(January 7th) I fell down onto my head after attempting to do a backflip, bad idea. Right afterwards I felt tired and fell asleep for nearly 4 hours and when I woke I was still tired so I went back to bed about an hour later and slept for about 9 hours. Today at school I have been sleepy which is very unlike me. I also haven't been able to concentrate that much and instead I just give the "blank stare". I have read many websites about the symptoms and I fit a vast majority of them except I haven't felt nauseous. I didn't bleed after the cuncussion and it dosn't hurt to touch my head where I fell yesterday but I am worried that something could be wrong.

Does it sound like a concussion? If so, do you have any suggestions on ways for me to stay awake during school?

Thank you