So, I had unprotected sex with someone the 27th and 29th of January. I got my period in February 1st and had it for four days, which is pretty regular for me. Then on the 5th/6th of February, I had unprotected sex with someone else and have slept with him various times throughout this month. I was supposed to have my period the 1st of March but never got it so I took a test and it said I'm pregnant. What I wanted to know is who could be the father? Please help!