Hi Idontlikeschool! Good to see you again. I hope you are seeing the doctor about what we spoke about in your earlier posting. Will this be the same doctor's visit?
Even though you aren't throwing up, it could be appendicitis. Then again, it could be nothing but a bit of cramping. The doctor will just ask you a lot of questions, and will do a physical, basically pressing down on the right abdomen and feeling around the area to see if you are in pain. Please don't worry. You are doing the right thing having it checked out.
FYI, as we get older we sometimes experience different pain or aches that don't really amount to anything. Nobody tells us about this stuff when we are young so we get nervous when it happens. You are doing the right thing checking it out and the doctor will have a better idea of what is going on.
I hope this helps ease your fear a bit.

Come back and let me know what is happening with you sweetie.