Hi, I m 15 and female. 1-2 weeks ago I bashed my right knee and got a small graze on the left of my knee cap. I thought nothing of it because I m clumsy anyway. Having just spotted it and shown my mum, I ve got a small hard lump where the graze was, and it moves with my skin when I pull it side to side. Asking my mum and dad, they reckon its a tiny piece of bone? And that if it disappears I could be in trouble? We re going to the doctors in 6 days anyway for other (nothing bad) reasons so we ll mention it then. Just wondering if I could be informed of what I m going to be told? Please help with the best advice, I m awful with hospitals and things like injections! Panicking so much:(