Trapped muscle 10 points it's hurting real bad?

Ok so I work out a lot.On tread-mill etc.I am after trapping a muscle.It's pains me to walk and to even touch.it's my left calf that is worse right is not as bad.I drink a lot of milk and eat a lot of bananas.So I have enough potassium.I also drink a lot of water while working out.I work out nearly every day.How can I make the muscle be released? Will I have to go to a doctor? how long will it take? And how long should I wait before working out again? I will be giving 10 points please answers :) thanks again ps I'm 16