 [ Symptoms ] i had sex 3 days before ovulation i have nausea and breast tenderness but got my period can i be pregnant [ Disease ] 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