So I had unprotected sex 6 days before my regular period. Since then I've been getting slight/mild cramping consistently for 3 days. I'm a day away from my period and I've been really nauseous since yesterday morning. I don't usually feel sick before my period and I don't usually have any sort of cramps until the day of my period. I'm not sure if I'm worrying myself too much. I don't know my ovulation or track it at all. But since my cycle is so sort is it possible?