i was sparring with a friend about 4 weeks ago, my shin hit his knee pretty hard...had a bruise and there was a lump....2 weeks later...the bruise is healing/ pain going away/ swelling going down almost....than i spar again hit my friend in the knee again at the same exact spot...than it got bigger, very very painful.....2 and half weeks have passed now currently it doesnt hurt but a lump is still there...i tried kicking a bag today and after awhile i felt a small pain so i stopped...so it doesnt hurt anymore but theres still a lump?...........so my question is...is it cracked/ fractured or anything? im worried