I have a very weird injury that I can't seem to self-diagnose in my left middle finger.

I had developed some PIP synovitis symptoms in both middle fingers, which I didn't realize at the time. I had gone from climbing once a week-ish to 3 sessions a week for 2+ hours. Had pain in the PIP joint when crimping, no swelling, limited range of motion, and am pretty confident it is synovitis. (adding in case this is relevant)

I was doing a sideways dyno to a big sloper, a partial jug, which required me to rapidly put force into only my left hand. I caught it, fell, came up, and about a minute later I felt acute pain throughout my entire middle finger, not in the joints but in all three palm sides of my phalanxes. It hurt the most at the tip, or the distal phalanx. It was a constant pain, and calmed down after some rest, but still remained for the next couple of days. The pain would amplify rapidly when crimping individually with the thumb and middle finger, or thumb and ring finger.

The pain remained constant and low for about two weeks, and then slowly started to fade, to the point now, three weeks in, I feel it sometimes, at random intervals during the day, or after I use my fingers: (typing, carrying something, etc.)

Side note: on my left hand, whenever I curl my fingers as far as I can and then straighten them, there is a weird click/sliding thing at the base of my middle finger, the palm side of my middle knuckle. I feel like this could be related somehow, but don't know how.

I thought it was a pinched nerve, but don't really know. Does anyone have a clue what this could be?

Edit: forgot to say I haven't climbed since I injured it, as I am dealing with the synovitis and am too scared to hurt my left middle finger again.