My knee seems to have a lot of play in it and seems to be dislocating alot. Afterwords it hurts and swells what could be wrong?
Patellar instability. Global joint laxity there are good patellar tracking braces available.
Loose ligaments. It is usually caused by a tear of a liament in the knee. There are 4 of them, including the anterior cruciate, which is what you may have done. The other possibility is the knee cap may be partially dislocating (subluxation).