UTI during first trimester

I think I have a UTI, never had one in my life before but I have been itching and burning down there... Can't think of anything else it would be. My first prenatal appointment is this coming Tuesday (in about 3 days) is it okay if I wait till then to get a urine test done? Will it affect the baby? I don't want to wait but I don't think they're going to get me in any earlier as I had to book months out just for this first appointment. Help!