Have you ever been tested for Interstitital Cystitis? It begins with constant UTI's, pain, difficulty peeing, starting, stopping, urgency to pee. My urethra was so shredded before I was diagnosed with IC, that I had to self-catheterize for almost 2 years before it healed. Glad it's only thrush, this time, but it wouldn't hurt to have a Urologist check you out.
Hugs & Prayers.