been noticing some pain right at the very top of my thigh for some weeks now, but it's getting worse. Now when I get up from a chair or sofa, or get out of bed, or even just start moving, I get a sudden stab of pain. I also feel it driving my car, when I put the clutch in. It's difficult to decide where exactly it is, my hip is aching a bit but the pain seems localized right where my thigh joins my torso, not right in the groin but more to the center of the thigh. I've never had anything like this in all my years of active sport. Have I pulled something, or could it be more serious?