I'm 21 and have had regualr period now for years, me and my boyfriend have unprotective sex due to trying to have a baby. I should have come on 4th feb but I have not seen any sign of my period yet. I have all the symptoms such as missed period, tender and enlarged breasts, nausea, weight gain and tierdness. I did a test this morning and it come back negative which I was gutted about. I'm really confused and need some advice asap.