Hi, my knee cap was feeling out of place and I was trying to bend and straighten it out while lying on the bed to fix it. I then went downstairs, felt a little out of place still, then I bent down with my knees to get something in a cabinet and it felt like a giant explosion of pain or fluid, behind my knee cap in the center, and I screamed briefly. Ive been sitting on the couch for the last 30 min and my knee, calf, thigh area is burning and a little numb....I don't see any swelling