Suggest Remedy For Soreness In Shoulder

Hello my name is Shelby, i am 16. i have currently been having trouble with my right shoulder. It started when i was playing softball for my high school team, and it hurt to rotate it, but now it has gotten better, now when i serve the ball in volleyball sometimes my shoulder will pop and my arm will start to tingle and i can't move it. That has happened about 3 times now. i would just like to know how i can help heal it fast, because i have a volleyball camo in 3 weeks.