Come internet friends & be regaled with the overly-explicit tale of Seth's surgical adventures:
So I saw a specialist today & she recommended referral to a general surgeon.
She pulled up my surgical records from appendectomess & reviewed the surgeons notes on procedures. According to her, when I went back 3 months later for laproscopy to remove appendix nub (srsly, surgeon called it a "nubbin" in the report >_<) there was a large mucin pocket they removed but they couldn't find a hole it might've been leaking from. There were also adhesions all the way from both drainage tube ports on my left, across suprapubital area (which is where pain lives usually) to where appendix used to be.
So anyway, she said the current MRI is consistent with mucin, which I guess means it was either there all this time, or something else is leaking. And pain could be from that or from scar tissue pulling stuff. Either way, best to open & see what's up.