The last time I had sex was a month ago. I took a Plan-B an hour after we had sex. I’ve taken several pregnancy tests all of them have been negative. I was scared cause I noticed yellow discharge I went to the doctor and it was chlymidia and they gave me an antibiotic to take I also was prescribed birth control “the pill”. I started taking the pill before my period came this month and my period is now late by 8 days. I took 2 more pregnancy test and they came back negative. Could it just be the birth control I’m taking and the antibiotic I took. I really don’t wanna be pregnant but I’ve been freaking about it a lot. Also I have had irregular periods in the past they come every month but not at the time they are projected to come at.