Me and my boyfriend had unprotected sex 2 days before my ovulation week which was 10 days ago, I have had slight cramp since yesterday morning and always feel nauseous when I wake up. The smell of food I used to love now knocks me sick. I woke up this morning with pinkish bleeding so I put a sanitary towel on but there is no blood, blood only shows when I wipe, my period is supposed to be due in 4 days and has never done this before, is this implantation bleeding or my period??