I have pcos, i am pregnant now, based on my uts last 5thmay 2014, i am 8.6 weeks my last period was feb 15. had sex only march 26. is the utz right?

U/S doesn't matter: If a woman had sex one time and is pregnant, then she could only have gotten pregnant from that one episode. So, it doesn't matter what the ultrasound says, and it doesn't matter when the last menstrual period was. (The only time it might matter is if she had sex a second time but doesn't remember it, such as if she had too many drinks at a party, or was "medicated".) U/S ~ 8.6 weeks is correct.