a pregnant woman can have a menstrual cycle for a month or so; even longer. this is why some women do not know they are pregnant. nausea and breast tenderness are not definitive signs of pregnancy any more than missing a period so you will need to wait for an accurate pregnancy test to provide you with more information on whether you are indeed pregnant or not.
i had sex 3 days before ovulation. i have nausea and breast tenderness but got my period. can i be pregnant?