I have been having cramps from both sides for about 2 weeks now, nausea, headaches and itchy/burning nipples. My last menstrual period was November 8th and I had sex before during and after my period and also during expected ovulation time but I really do not know when I ovulate because I have irregular periods, I took 3 pregnancy tests 1 right after period 1 the next week after that and another 4 days ago. Maybe I am testing too early and will wait for my next period which should be December 11 but im confused right now. What is going on ?