Pregnant the same month as a miscarriage?

According to my LMP, I was 8 weeks when I miscarried. But according to the sonogram, I was only 5 weeks, 2 days pregnant when the MC happened. I didn't need a D&C. The miscarriage happened early in June, I don't remember the exact time. But it might have been around June 6th. My husband and I had unprotected sex after that a few times. He only ejaculated inside of me once though. The other times he pulled out because he wasn't sure if it was possible for me to get pregnant so quickly, and neither was I. So, what are the chances that I did conceive from this?