My husband and I have been trying to concieve our second child since Dec. My periods have been regular every 27 days since Feb. My LMP was April 30 and I haven't had a period since then. The week my period was due I was very tired, having urinary frequency and breast tenderness. All of which are not normal for me before I get my period. I've had 3 neg. hpt and a neg. blood test. Is it possible to have all those neg. tests and still be pregnant?