I've been getting chest pains for the past two days?!

I've been getting chest pains for the past two days?

i dont know the cause, and i dont know if its serious but between my ribs on my left side theres mild discomfort, i really need help with this. im only 13 so heart attack? not likely. and this had just come about within the past two days. the pain goes away after a few minutes, 5 at the most. what could it be thats causing this??

3 days ago
its mainly mild discomfort. its not very sharp, but it does hurt.

Trapped air. Lay flat on your stomach and raise your buttocks in the air. Hold the position for a few minutes and any trapped air should be expelled.