Explanation please

I’m 14 weeks pregnant and a 1st time mom. For the past month and a half I constantly feel like I have a UTI. My doctor took a pee sample and said I don’t have one. I’m prone to them before I got pregnant it’s a genetic thing in my family. And no matter what I do i feel like I have to pee when there’s no pee in me. And I’ll be laying in bed and all of a sudden my bladder will be stinging with pain. It’s extremely uncomfortable, I’ve done every possible thing to prevent having one.

Has anyone else had this problem through any of there pregnancies.