Oh no, that sounds awful
I've never personally had a UTI related to exercise that I know of. If it gets too extreme, I hope you'll call a doctor!
Excessive showering? How often are you showering? Could you simply clean up with some baby wipes after a workout instead of over-showering?
I know everyone says to always wear cotton undies, but I don't think that should apply when working out, because cotton takes so long to dry. I highly recommend a quick dry material for your underthings for exercise. I do a lot of long-distance hiking and have never experienced an issue down there.
I swear by my
Ex-Officio panties. They are pricey, but they are super comfortable and never leave me feeling damp. Sometimes you can catch a really good price on Amazon. But there's other brands that do similar things, just look for ones that say "quick dry" or "moisture wicking."
You might also try drinking a little cranberry juice (unsweetened) or taking cranberry pills, as a preventative measure. Worked for me the last time I had a string of UTIs.