I'm 7 days late for my period but I haven't had sex. I haven't even started to pms or spot and usually do when I'm this late. I've had my period for two years and my doctor said I should be regular but I'm not, each month it's different...sooo annoying! My mom said if I'm not regular by december that I'm going to a doctor to talk about it and possibly go on birth control to balance it out. I'm just not sure what to think about this?!?