I had sex in July but I got my period in July (I know so because it was super heavy like normal and had clots in it and lasted the normal duration) and in August to today I haven't had sex at all, but my period is four days late. I always thought I had irregular periods but I've had glow now for a while and looking back all my periods start on the first of each month and all of them do. so I know I don't have irregular periods. it worries me a little I want to take a pregnancy test just in case though I don't know who the father could be if I was pregnant because i didn't have sex since my last but period xD so I don't think I am. I know if I take one I will probably end up getting my period right after taking the test xD