its a long story so I wont go into too much detail but what im trying to figure out is if my baby is my bf or my friends..my first ultrasound I went to they told me I was 8w 0d lmp. which would totally mean it is my bf. because I wouldve concieved march 12 and my baby was just a blob with a yolk sac. it was just starting to form arm buds. no legs were present as far as I could see. but I had sex with my friend feb 2 and waswondering if there is anyway possible my due date could be a month off. with my friend my due date would be oct 26 but im told my due date is dec 3 how far off can an 8 week ultrasound be?