Sir,
I had unprotected sex with my BF last month after for 3-4 days my menstrual cycle ended. My menstrual cycle started on 22nd january and I had sex on 26th, 27th, and 29th of the same month. However I would like to inform you that he did not ejaculate inside me and took off his penis everytime. I expected my periods by 18th of this month but today is 19th and I'm still waiting for my periods. Please tell me why is this happening.