I had the same problem and they gave me antibiotics. The problem continued after I finished the antibiotics so they took a urine and blood sample and there was nothing wrong. They basically told me it was down to the baby pressing against my bladder and hormonal changes. I have been peeing at least once every hour since about 15 weeks. I'm now nearly 25! It's driving me crazy
I'm almost 14 weeks, I didn't think the baby could push on my bladder til it got a little bit bigger. You poor thing! I could barely get any sleep at all last night because I was up and down, up and down! And it still hasn't stop. I could imagine going through this all pregnancy:(
It is possible to still have a UTI. Your doctor can do a culture to see if the antibiotics you were given work for the type of bacteria causing the infection. If it isn't that, it could just be the growing baby and uterus pushing on your bladder. I hope it isn't kidney stones like I have, though. They make you have to pee all the time. Make sure you drink a ton of water, and try to avoid sugary foods because bacteria love sugar.