I have a question my left kneecap just shifted and now i have extreme pain the back of the calf what could be wrong and are these two things connected? please help i am in pain. having a hard time walking cause if the calf pain?

Patella dislocation: In view of the associated severe calf pain, I suspect a separate entity like severe calf strain or development of acute popliteal tendonitis. In any event I recommend getting off your leg with use of crutches and being evaluated &treated by an orthopedic specialist. In the meantime, rest,elevate the leg, apply cold compresses to painful areas of knee & calf for 20 minutes periodically.