My due date is 4/27/14 on sep-16-13 i got a ultrasound and the doctor said i was 7 weeks 3 days, question is can this pregnancy be from july-7-13?

Impossible: You had a period after the dates you are inquiring about. That makes it impossible for pregnancy to have occurred from those dates. You can easily verify this with a conception calculator widely available on the web. I use and trust this one: http://www.Babymed.Com/pregnancy-due-date-calculator. For your pregnancy sex occurred between 7/30/2013 and 8/4/2013.