I had hyaluronic acid injections in my knees years ago when I was aggressively bone on bone and felt like it did a lot of good with relieving pain. The thing with these types of injections is that studies have shown the substance is reabsorbed by the body within a few months. So insurance companies may or may not cover your injections. If your doctor recommends it and your insurance covers or you pay out-of-pocket, you might think about giving it a try.
I keep seeing these "experts" saying Hyaluronic acid is a placebo. My knees would hurt so bad driving that I would have to stop every 100 miles and walk a little. If I went for a 400-mile motorcycle ride, I was stopping every 25 miles in the last 100 to stretch. Thought I was going to have to give it up. My wife 3 years younger than me and was in worse shape. She got a set of these shots, and I could tell she wasn't in near as much pain. So, I got a three-week course about a month behind her. When I go for my three mile walks, I feel like I could run again. My doctor doesn't want me to, but I have a little with little pain. I no longer am rubbing my knees while on long drives. And I rode my motorcycle 530 miles one day about a week ago. Some of the studies that I have read say that the studies that poopoo it were studying people that no cartilage left. I plan to keep on getting them every 6 months. I am 68 and played pretty competitive basketball until I was 62.
I'm glad you are getting such good relief from the hyaluronic acid injections. I remember feeling like it did me a world of good too when I had them years ago. I think the thing that Insurance doesn't like is that the substance is reabsorbed by the body and it only has a lasting effect for a few months. I think if it helps you, keep on doing it!