Suggest Treatment For Painful Swelling In The Knee After Meniscus Surgery

I had meniscus repair surgery in April of 2015, I learned that the Dr removed 60% of the cartilage. I had severe pain after the surgery and had a Synvisc injection in July 2015 with pain relief in 2 days. The severe pain started again in Sept of 2016 and I again had a Synvisc injection with no pain relief. The Dr told me the cartilage is worn out. I continue to have severe pain with no relief from Tylenol, Aleve, Ibuprofen or Tylenol#3 or heat or ice packs . I have noticed that at the end of the day, after walking at work all day, there is significant swelling on the inner side of the knee. What can I do for pain relief?