I am 28 years old.I have had three consecutive missed periods. My last period was due on 28th Oct. Last month, Dec 2010- The blood test results were negative for pregnancy and no hormonal imbalance was detected(no PCOS). Vaginal ultrasound showed increased follicle size and GP advised that it means I could be ovulating and/or my ovaries were about to release an egg. Although a period was missed. Since last week I am experiencing severe abdominal cramping,sore nipples and tender breasts, mood swings etc which are typical PMS symptoms. I have been spotting since yesterday, no period started yet. Wonder what's happening? Not sure if I could be pregnant as home test came negative. My partner and i are trying for a baby. should I wait until my menses are regulated? Could you please help?