To me, it sounds like you need to see a hand specialist. I have 3 torn ligaments in my wrist, tendonitis (due to unstable wrist) and bony abnormalities. Your description of the fluid on top of the wrist sounds familiar to me. Only the hand specialist can properly diagnose your situation. Hopefully, he/she will listen and do a full evaluation of the hand and wrist. Some stuff may be attributable to TOS and some may be specific to the wrist/hand. I'm glad that my doctor listened to me, did a full evaluation and didn't just attribute the ulnar sided wrist pain to a return of TOS.

The hand specialist should refer you for hand therapy . It sounds like you need some hand specific therapy from a certified hand therapist. My doctors practice has 4 to 5 hand therapists on site.

Personally, I'd research local hand specialists and try to find the best one you can. I stumbled on mine (referral from my PCP) but he has a very good reputation from other doctors and physical therapists.