Hi im a dancer and for the past 4-6 weeks my left knee has felt really tight. I stretch frequently and just couldnt seem to release the tightness.

Just the other day when i was sitting crossed legged with left over right i heard my left knee crack about 6 times as i lent forward to stretch. It was a similar sound that you would hear when someone cracks your back. I have been iceing it atm but it is extremely sore. Movement is limited.
Any advice???