I took a weird fall in May off a bench. The lower part of my leg, went a weird left, while my body fell backwards, so my knee took a weird twist. Now, it hurts when I stable on it from sitting. Help..

Need to know more. I have to ask you few more question, have you ever experienced your knee gives away or lock, .
Knee sprain or damag. It sounds like it could be some sort of damage to your knees. It varies from minor sprained ligaments which will resolve with rest but if it persists, it can suggest more structural problem like damaged meniscus or torn ligaments which will need orthopedic surgery evaluation. Can first get an X-ray of your affected knee to start. .