Weird question, but

Okay so I've been feeling really sore on the right side of my crotch. It's the crease where it meets with my leg. It's really sore and it hurts to walk. And it gets really stiff if I've been standing or sitting awhile. It's been like this for a week. And today he's on my left side, so I feel him move. Could he still be sitting on a nerve? Or is this something else?