Ok here  I am again cycle is late last month it came on for three days & was off again came on early right after my boyfriend & I had unprotected sex last month before that no sign of my cycle so that June that I have my missed  .July came it last for three days I'm guessing my bf knocker it down early but this month August no sign again what's going on cause stress calls this or I'm pregnant & my bf keep asking me I'm really confused I need answer have anyone else Been through this help