I am a 26 year old female. I recently had unprotected sex with a new partner. A few days later I began to feel symptoms of a yeast infection. I went to the doctor 6 days after having sex and got a pap smear and STD testing. All results came back negative. I was prescribed Diflucan, which cleared up the infection. I had sex with the same person again and about a week later began feeling symptoms of a UTI. I took a uristat test and the pills, but they didn't help. I guess my question is, how reliable is a pap smear/STD testing, 6 days after having sex? My other question is, is it common to get a UTI and/or YI after having sex with a new partner? Should I be concerned?