Suggest Remedy To Relieve Pain In Knee Due To Injury

I have a bone bruise to L. femur & tibia after a fall in 12/10. After some improvement with recent land and pool therapy, the pain has suddenly flared in the past 2 weeks. History: Grade IV chondromalacia in both knees, prior L. meniscus surgery. Pain to R. knee initiated 3 mos after 4/10 auto accident. I'm very overweight, and realize the need to lose; however, pain cycle has not been broken, and I can barely walk. What would you recommend at this point? Thank you.