Gilmore groin is another name for this. Footballers suffer from it. There are all sorts of quack ideas like neoprene shorts and there are a few forumites who have had this and had surgery. Some Internet resources would indicate that treatment can include Physio and strength training. No reason why you can't still run, using the old adage. If it hurts slow down, if it still hurts slow down more, if it still hurts stop!!!!