My mom has recurrent UTIs.

My mom was diagnosed with uterine cancer in 2018 after experiencing postmenopausal bleeding in her late 60s. She underwent a complete hysterectomy and was staged 1B. Following the surgery, she had several sessions of radiation therapy.
A couple of months later, she began complaining of extreme pain in her coccyx. Her oncologist attributed the pain to arthritis and suggested that she use a patch for back pain. However, in December, I took her to the emergency room because she was in so much pain that she was crying. A CT scan revealed a large tumor in her coccyx, and the oncologist informed us that she was now stage 4 and would require additional radiation.
Mom was doing so poorly that we feared for her life, so we transferred her care to City of Hope. She began treatment with Keytruda and experienced significant improvement. Now, years later, her kidney and liver test levels have not been good, but her tumor has remained stable, which led her current oncologist to give her a break from treatment, stating that she was stable.
Since December 2024, she has been experiencing recurrent UTIs, with intense burning and pain when urinating.
Her primary doctor has been prescribing antibiotics and some vaginal cream since she may be experiencing dryness.
Recently, my mom noticed some pink discharge, which caused her to panic and worry, and we are all concerned.
The hospital where her oncologist practices is aware of this, and she has been asked to undergo a CT scan immediately.
I feel so guilty because, all this time, she hasn't had a pelvic exam, and I overlooked requesting one for her.
Although I'm grateful for all these years she has been with us, I can't help but wonder if she was misdiagnosed and was more advanced on the cancer than what they told us. Perhaps then she could have better treatment and could be cancer-free.
This cancer journey is so emotional, painful, and sad, 😔