Hi, I m a 21 year old female, about 68kg and 169cm, have been told I am a healthy weight. I have been taking the birth control pill Cilest from about 10 months now. I have only ever had spotting when I ran my pill over for 3 months in December and have not done it again. I had unprotected sex during the end of my seven day withdrawal bleed (days 6&7) and took my first pill of my next pack on time. A week later I have wiped when going to the toilet and my discharge was tinged with pink. Went to chemist and they said to take pregnancy test (although surely this is too early? Pharmacist said not) and was negative. Still very concerned that I am pregnant as I am not ready to have a baby. I have been screened (as has my partner) for STIs 3 weeks ago - all clear - have been with the same sexual partner for 6 years. Also 2 days ago I had abnormal discharge in that it was white/thick when coming out and then dried yellow/green and smelt strongly of vinegar. Any ideas what could be going on?