My dominant arm is hurting sooo much from tennis! what to do?

I am a sophmore in varsity girls tennis team and right now is the season. Since we've been playing evryday for a while now, my whole dominant arm has been hurting so much. I try to relax it a couple of days(the weekend) but it still hurts. I cant do anything with my other hand obviously so never rests! What to do? There's still a whole month left till the season ends!!!=( Wat to do? i heard ice works is it true? do i try putting something like ice??? It just started with only my wrist hurting, then wirst and shoulder, and wirst, shoulder, and elbow too!!!=( Please any advice would really help!=) thanx!