Pitching: Soreness in shoulder, best recovery solution?

Ok, so my baseball season just started and I havent pitched in a while but i recently had practice and pitched a couple of innings. My arm felt decent but after I was done, my shoulder started to bother me. When I release the ball, I feel a sharp pain on the top of my shoulder. This could be just soreness, but any suggestions to recover from it quickly. BTW, I didnt have practice today, so the last time I threw was about 30 hours ago. Ice it? Heat it? Thanks for the help guys