I had unprotected sex a week ago,and after that i had an infection,the doc said i have UTI and gave me Bactrim antibiotics and Canex V cream,ive been taking 'em for 4 days now. I feel much better now. What i wanna know is,is it possible that i might be pregnant...? and can the antibiotics cause any harm? does one get pregnant while in pains cause of the infection? I'll be goin on my period in 5 days.