Sap 22---
Try less vagifem....you may not need that much on 50 patch, usually that much is used by women who aren't on HRT.
In fact, I would stop it for a week and see if you get any better. You might check for yeast that can occur with stinging, burning and absence of the typical white discharge. Since the bladder and vagina form together, sensations are similar and sometimes it is hard to tell which is the problem.
The usual dose of vagifem is 2x weekly although admittedly, some women do need more.