UTI?? (tmi)

Towards the end of last summer Ive been randomly having a strong urge to pee. I can not hold it in at all and when I do pee, it smells bad. I think it's a UTI, but im not sure and i'm scared to tell my mom. Im 17, almost 18 and i went to the OBGYN not that long ago and the doctor didn't see anything wrong or say anything. What do i do?