I have had symptoms of a YI for over a month now (thick discharge, soreness, itching) but two sets of high vaginal swabs came back all negative. The nurse told me it definitely looked like a YI, but no candida was found. I am really feeling worried because I had this exact problem around Christmas and I ended up being diagnosed with suspected PID and really bad pain. But right now I am testing negative for YI, BV, chlamydia, gonorrhea and trich. I've a bazillion clear STI checks and so has my boyfriend, and in any case we've only had sex once since February. So what do I do now?