Thanks for the good wishes.

I think it may have been a concussion. I looked it up and this is what I found:

"Grade 1
The mild concussion occurs when the person does not lose consciousness (pass out) but may seem dazed. "

and..

"The most common physical symptom of a concussion is a headache. Other symptoms can be:
dizziness
problems with sleeping or insomnia
fatigue
behavioral change
changes in emotions, irritability, unexplained crying, etc.
changes in cognition, loss of memory, lack of attention, etc. "

I've had dizziness, some fatigue (after 10 hours of sleeping this morning!), some slight memory loss (just for a bit) and my mind's been wandering off alot lately..and a really big change in emotions. I was in a horrible mood this morning for no reason and snapped at friends. Hmm..well, I talked to my mom about it and she said she'll see if she can get an appointment for tomorrow. Now I'm really scared..