welcome to HW. I understand what you mean with having little faith with doctors. From all of the docs I have seen I still can't figure out why no one has been able to bring me to a functioning level. Over a dozen specialists and my condition deteriorates still.
I've a background in nursing and currently "trying" to specialize in rheumatics and infectious disease.
From what you listed RA, OA, or Gout is suspected from what you describe. Since you're a man and you noticed it in your feet and ankles and hands....I would suspect Gout. Are you noticing if your condition (joints) feel extra worse after shellfish? That would trigger more pain if it's Gouty arthritis.
Is the joint pain bilateral? (equal on both sides of your body?)
The whole process of starting with rheumatologists and specialists is such a pain in the a**! I feel half the time they have no idea what they are doing....especially if you are not a TEXT BOOK case of arthritis. Since I am pretty young (24) and my joint pain started in my knees when I was 13; been positive RA @ 15 (docs told me to ignore it) . Now I'm so bad that biologics and DMARDS aren't even doing the trick, and since i rarely have "swollen" , joints i get all of the time "well maybe it's something else other than RA".
If what you are feeling is disrupting your life and you are in pain I would find the best NO NONESENSE internists or rheummy in your area and don't leave that office until you get appropriate and aggressive actions from the doc. I would hate to see a case of arthritis be neglected at a point where it might still be treatable and where you can resume a normal "you" again. If you know in your gut there's a problem definitely see someone with a good reputation and who is a good diagnostician.
Bless you & I wish you the best