Sprain again

Just now played tennis with colleagues and went gym after tennis. During tennis session I sprain left back thigh. It is not tat too serious and think can go gym. Then when in the gym class while doing some movement my right back thigh old sprain which I thought recovered pain again and this time real pain =( I think at the moment I cant squad and bend my leg. Realy scare sunday cant go rock climbing which I don wan to miss. And tomorrow I will go gym also leh...pls and hope my leg ok by tomorrow.