I regrettably had a one night stand approx 5 months ago (worst thing I ever did I know this) anyway he used a condom and I have had periods every month since but I'm a very paranoid person (can't help it lol) could the condom have split and he didn't tell me? I know some women don't have movement at this period but I am overweight so maybe it's that..I've got sore breasts on and off over the last couple months and I get sick sometimes (but I don't know if that's from my bipolar meds, the sickness) I do have erratic moods but as I have bipolar can't be sure if it would be pregnancy, I feel so ashamed of myself and if I'm pregnant then the baby will have no father (cos I don't talk to the guy) am I a bad person? Or am I over thinking things and being paranoid? Help please?