hi my knees both lock and crack on the inside of my knees. i am 28 years old male, i have played sports all my life except the last 3-4 year. my right knee is worse than my left. i can feel it needs to crack when i am laid down so have to crack it and when i drive i can feel it goin so have to pump the pedal till it cracks, the crack then appears to open then at the top part of the knee and is painful. can you please help with this