Hello
Other members will be able to give advice, but in the meantime, have you tried cranberry juice? Drinking it daily clears up and prevents UTIs. I've been told taking apple cider vinegar also helps, you can get it in tablet/pill form.
Also look into what you wash yourself with. Use just basic olive oil soap, or other handmade soap, goat milk or oat milk soaps are great. Avoid scented body washes.
Apply coconut oil, not any scented lotions to that area.
If you are sexually active, make sure your partner is clean, his hands too. I don't mean clean from STIs, but physically clean, showering daily and washing his hands before touching you there. People pick up all sorts of dirt and germs on our hands, and if he touches you there, or if you touch yourself, it can cause UTIs. If you use lubricants, these might be the cause, you can switch to coconut oil instead.