That's something only your Doctor can really answer. Way too many things it could be. Call and make a Doctors Appt. And have it checked out. Better safe than sorry.
I have a slight pain in my abdominal area. I can bear it, and it hurts more when I sit down. It isn't just at one side. What is this?? (I'm 14)
It could be any number of things. Talk to a parent. They can help you assess if it is something that needs to treated at home or if you need to seen by a doctor.