ULCERATIVE COLITIS,UCERIS,AND ANTIBIOTIC

I have been in remission taking APRISO twice a day with total amount being 7 capsules 4 in morning 3 in evening.
Everything was great until I got this lump under my chin on left side near my jawline
My GP said it was probably a gland that produces saliva.
She gave me an antibiotic 875 mg to take twice a day.
I have been having diarrhea and worried about a full flare.
I spoke to my GI and he says the two don't mix together well at all.
He had no real solution. He said Kaopectate or Imodium won't do the trick. He said he was also concerned about CDIF and will have me do a stool test Monday if diarrhea continues. He was in between patients when he called.
I asked him if I should take a UCERIS while on this antibiotic for three more days and he said ok try it
I don't why he is concerned about CDIF ( I have another call into him) but am concerned about the mix of UCERIS,and AMOX anti biotic.
Has anyone out ther had reactions with antibiotics and colitis?
If so please share your thoughts!
I'm between a rock and a hard place!

Antibiotics kill many bacteria in the gastrointestinal tract both good and bad ones. Many bad ones, like cdiff, are opportunistic and are able to reproduce rapidly in situations like that. It may or may not be cdiff, but testing your stool does make a lot of sense.

Uceris will not help if cdiff is the cause. But uceris will help if it's inflammation due to a uc flare. Your gastroenterologist is taking a two pronged approach. Depending on the results of the stool test, you might be asked to stop uceris.

Often a scope (a colonoscopy or flexible sigmoidoscopy) is done when uc symptoms worsten.