So my last period was August 18-25 and it’s October 1st and still no period. I’ve taken about 8 pregnancy tests and all have said negative. It’s been over 4 weeks since I’ve last had sex and have had no signs of pregnancy. I’ve also been on the pill for about a year now. I’ve been stressing about being pregnant and not having a period ever since I’ve had sex. Is it possible that I missed my period due to stress?