Afraid of going to the doctors

So I’m 16 and I have symptoms of a UTI... my parents don’t believe in going to the doctors but I think something might be wrong. Also my mum believes I’m a virgin and I am not. I want to go get a check up or test (I don’t know how it works cause I’ve never been) but I’m also not very open to having someone poke around my private parts. It’s only been a few days of having any symptoms and I just had sex the day before they began but it’s nothing like I’ve ever felt before.

Also is anyone aware of what questions might be asked if I do end up going?