My period ended regularly. I had unprotected sex a few days later although my partner didn't finish. Then a couple of days later after that my period came on again. It was a normal period flow and lasted a week. Which is normal. So when my next scheduled period was due it came, but it was light compared to my normal flow. I'm never light. Now my breasts/nipples are itchy and swollen and I wanted to know if it was possible Im pregnant. Should I be concerned?