B.C.
I'm not sure why people think peeing a lot is an early sign of pregnancy.
For the most part, when I got pregnant - I had zero, zip nada 'signs' at all and didn't for several months in spite of a positive blood test.
It didn't get 'real' for me till I heard the babies heartbeat.
If newly pregnant, the embryo is microscopic, like smaller than a pin head, and in no way affects your peeing ability/capacity for many many months.
Bladder infection, STDs, kidney stones, cancer, muscular issues, etc - yeah, all of those are possibilities but only a doctor can help you figure this out.
Please make an appointment and I hope you and your medical professional can get this solved for you.