Me and my boyfriend were having sex, and the condom broke. We did not realize it till afterwards, so he came inside of me. Because I am not on birth control, went and got Plan B One Step and took it a couple hours later(sometime between 2-4hours after). Two days later I had pain when I urinated, so I went to the doctor and have a UTI. I was prescribed a antibiotic, I took two doses and realized it could effect the plan b. So will this effect the plan b? Should I not take the antibiotic for a couple days? Or has the two doses I've already taken have effected it?