Random abdominal pains....?

okay soo, 4 days ago i had this pain in my left abdominal pain, so my bestfriend told me she had the same problem and the docs. told her it was just muscle pain. So fortunatly it went away... the next morning i woke up with this cramping like pain in both my left and right sides. The pains feel like you constantly have to go to the bathroom, or hunger cramps. They come and go.the usually last a bit, then go away. Sometimes when i take a "number 2" it goes away, or sometimes after i eat it goes away. It usually hurts at night when im laying down and forces me to go to the bathroom 3 times a night and goes away, sometimes at night after i go to the bathroom and lay down i get those cramps again. I know its not appendicitis, cause i know the symptoms cause my brother had it. I'm not on my period cause i just finished a week ago, and i can go to the bathroom and eat normally. They only come sometimes and randomly, and they arent severe either. please help? any ideas????