I wanted to know if there was a chance I could be pregnant. The first day of my last period was 14th January. I had unprotected sex from 10-15 Feb. It has been 36 days since my period and although they can sometimes be irregular, i think I had implantation bleeding on Monday as there was the tiniest bit of pink discharge. I've also been having slight abdomen cramps, feeling very fatigue and getting the odd dizzy spell.