On Wednesday, May 22, I forgot to take my contraceptive pill and I had unprotected sex. My boyfriend ejaculated inside, so on May 23 I took the postday. A week went by and I was 4 days after my period was down, but I just had sex and when I was clean I noticed a slightly pink discharge. Is it because of the postday? Should I have a pregnancy test or wait for the rule to go down in the next few days? Do I run the risk of pregnancy?