19 Years Old With SERIOUS Knee Problems?

You could have osteo condroma, which is what I have. Or maybe, you weren't wearing proper shoes with arch support when you bicycled and your arch slipped out of place. I didn't wear the right shoes and the beginning of cross country and i felt similar pain in my knees. I couldn't even walk. As soon as i got new shoes, the pain went away. but id talk to a doctor for professional consultation.