i am naturally flexible and i havent been exercising for a long time now but this summer i took up tae kwon do and i wasn't tired after the class so i starting messing around and tried spliting... i could do it easily naturally and go down but i heard crack this time right under my butt.. and it started to feel tender. so i started to stretch it out to make it feel better and after it did feel ok but i woke up the next day with it hurting a bit and now i limp sometimes and i cant stretch it out doing some things like holding it up straight beside me like it used to? what to do doctor im worried i might have pulled a muscles or something