Doctors?

I think I may have a uti. I didn’t know about the ‘peeing after sex’ thing and I’m scared. It hurt a lot within the first couple days but now it hurts just a little. Do I need to go to the doctors? I feel like I should but I know my parents wouldn’t take me. They don’t even know I’m having sex. And they think doctors are stupid and that they’re a scam for money. But don’t I need some kind of antibiotics or something? I’ve been researching and a lot of sites say to drink cranberry juice but other sites say that doesn’t work. Ugh! Help!!!