Hi Cheeks,
I am having symptoms of it now after undergoing 2nd treatment which includes cyclophosphamide and Neulasta.
Just finished course of antibiotic for various vague bladder symptoms, earache, recurrence of tiny breast hole discharge, and low-grade temp so really don't think it is UTI.
Symptoms of cystitis started after second chemo treatment, so I am guessing in my case it may be because of the cyclophosphamide.
I would say it is worth mentioning to doctor if not already mentioned.
Wishing you the best,
Sue