My knee hurts after i hit my knee in a car accident last week, should i be worried about an mcl tear?

It depends.: If you have pain along the inside (medial aspect) of your knee you may have had a MCL injury, but typically a person strikes the knee on the patella (knee cap) so a patella fracture or post-traumatic patella chondromalacia are more common.

Get evaluated: Dash board injury is one way for injury to the knee cap, the crucitaes as well the condyles of the femur, would suggest a full eval including xrays.