My due date going off my ultrasounds is the 4th November 2010, though i am in a mess on when i fell pregnant. My periods are irregular and often only last a few days. I slept with a friend on the 24th & 25th of January, i then bled very lightly for a day or two on the 29th January. I then got back with my ex partner on the 31st January and had sex with him most days for the follwing two weeks, please help me. I have made such a mess, i need to know when i concieved and who the father of my baby is. Thank you.