So I had unprotected sex a couple times 2 or 3 days before my period. My period is always 6 days. I can't remember a time it wasn't 6 days. Well this time is was only 3 days. Is it possible that I could be pregnant. I mean I obviously haven't felt any physical signs. I have been sick all day but I thought it was just being worried about the possibility. It's only been 5 days since  I had sex so I feel lik I could be just overthinking it but I've never had such a short period.