I had exactly the same globules on a small area of my Marbles disc,it was a result of a bite from the female when she was getting harassed by the male,i left it for about two weeks before gently scraping it off with a surgical blade then salting the whole tank....it never returned.During all this the fishes appetite didnt change,i feel you have a gtreater problem than those cosmetic globules.Can i ask are these globules scattered all over the disc or just in one area,i would guess just in one area,theres a lot of mucus on the fish,this could be a reaction to various treatments,these worms you mention are a bit puzzling too,i dont think for a minute the globules are connected to the loss of appetite.
Dont rule out the obvious...White spot! though not often a disease associated with rays they do contract it and all that body slime is classic symptoms.
I wish you all the best.