I have a problem with my gums?

in the far back corner of the upper part of my mouth i have a pain in my gum. if i push it, it fells like a bee sting, and if i move my chin side to side it feels really sore. i think all my teeth have grown in(im 14) except wisdom but i dont think im ready for them yet. i have braces but thats not effecting it. its been like 2 days now. i tried water picking it but i couldnt take the pain on the lowest power. i thought maybe there was food but i dont feel anything. also it only hurts on my right side, not my left. it doesnt feel swollen. just please help