Has anyone had to take Bactrim for a uti? My ob prescribed me 1 pill a day for 5 days to treat an asymptomatic uti (asymptomatic bacteriuria?) he instructed I start taking it in July being that I'll officially be over 14 weeks pregnant. I read some things online and it's a category c for pregnancy which seems a little a scary. Should I ask for something else? Anyone expierence this before, this is my 1st pregnancy.