I've had a lot of things go wrong on my journey. No major injuries other than a ruptured Achilles tendon. The usual knee pain, plus chondromalacia, bursitis, PMR, arthritic facets, lumbar stenosis, a saddle sore that I've had for years, an undiagnosed pain on my left foot, probably a displaced bone. But it goes on. I research and fix, one by one - except for that saddle sore but I'm actively working on that one and it's getting better. I'm not complaining, I'm celebrating!

You could try:
Glucosamine sulfate (the sulfate only), 1000mg 2Xday, MSM 1000mg 1 in evening. Takes at least 6 weeks to make any difference. Ignore the nay-sayers, just do it.
These stretches every morning: IT Band pain (during ride)
Squats. Start with a chair behind you. Go down until you touch the chair, arms straight out in front of you, reps until you feel that's enough already. Work up to that slowly, slowly. When that's easy, remove the chair and work on going down until your hams bottom out against your calves, say twice a week for these exercises.
Hope this helps. Report back.

Edit: I forgot to include a meniscus tear from doing something stupid in the gym, and then the orthopod doing a meniscus snip and the 8 or so weeks of active recovery from that. I had to kind of hold up my doctor to get the MRI necessary for diagnosis. Funny how a diagnosis is often the hardest thing to come by. As suggested by big john, above, a scoping is something worth looking into.