I am slightly concerned about this! I took my first urine sample last Thursday 10/25/12 and my OB's office just called me yesterday 10/30/12 to tell me I had a UTI. I am 6 weeks along and had no idea I even had one. They immediately prescribed an antibiotic, but I am just baffled they didn't call me sooner. Now I am concerned this can have negative effects on my pregnancy.