I had sex with my boyfriend on May 16th and the condom broke. However, I was already 3 days late from my period before. After 36 hours of the intercourse I took plan b one step. I was tired and had head aches. And had bleeding for 8 days but it was super light. I don't know if that counted for my period. It's June 9th and I'm expecting for my period in 5 days and I can't stop stressing and I hear that stress can mess up the menstrual ovulation.