Urinary tract infection?

I have a 4 year, spayed dog. I haven’t had any problems with her and she’s a happy family pet. She is house trained and doesn’t have accidents in the house.

A few hours ago I started noticing little puddles here and there. She is also drinking water more frequently. I’m assuming that she might have an UTI. She doesn’t appear in discomfort, she remains really interested in food, her mood seems alright. Basically everything seems as normal apart from the little puddles she leaves when she has been sitting somewhere.

I can’t take her to the vet until tomorrow and if I ask for a same day appointment, they treat it as an emergency appointment (even if they’re not fully booked) and therefore the cost starts at around £100. I won’t walk away without having spent £200, which is quite an expense for me at the moment.

Does this sound like an UTI? (I appreciate that only a test can tell conclusively). Is there anything I can do to help her? (She has plenty of water and can go outside when she wants).