What Causes Pain In Hip Area And Tightness In Calf Muscle?

Hi im a male 22 years old. I recently have gotten a pain in my right upper thigh/hip area that hurts all the time but more when i sit for awhile then stand or stand for a while then sit. Also it seems my hamstring is tight because i cant stretch my leg straight out with out the pain jumping to max. Sometimes the muscles through out my right leg will twitch as well. it has been like this for about a week now and there has been no improve meant or change except for the fact that now my right calf is tight n hurts some now as well as my right hip hurts too. Before this i played basketball about everyother day but when this started i had not played for atleast three or four days. What could this be? Thanks