About 4 weeks ago I took a good tumble off of the bike. At around 40mph hit a stump, stump turned the front end and hit the right bar end on my inner thigh when I went over the bars. Large bruise in the area for a week or so, limped around for a day or two. Still have a hard lump about 3/4" diameter where the bar hit the leg. Will this go away? Should I have it checked out?