Welcome to the forum.
We're not allowed to diagnose, and I'm not medically trained, but weeing more often could possibly be early symptoms of a UTI, or an irritable bladder. Dry mouth could be a side effect of a medication you're on. Worth checking through any side efffects of prescribed and over the counter medication. Are you drinking enough, as if you're losing a lot of fluid through weeing, you might just be a bit dehydrated, which would cause a dry mouth.