Me and my fiancé had sex the day before I was due to ovulate which was on the 12th of Oct. I have had irregular periods in the past but not much this year. But my period is still hard to count. I started to spot brownish discharge on the 14th and 15th Which was 12days before my period was due. I passed some light watery blood accompanied by dry brown discharge on the day I was 12days late I havent seen anything else since then. Now I'm 17 days late with period like cramps. I've taken two hpt both came back negative. Am I pregnant?