You can give or take a week usually from the u/s so anytime that week is possible yes. I thought you didn't sleep with anyone between April 19th and May 18th so that is why I was confused. Hope this helped.
yes this does makes sense... if i go by wut u are saying then i wud hav been pregnant on may 3rd not the 4th and that just means that i wud hav been 15days pregnant wen i slept with my ex.
I agree with majikat... the u/s wouldn't be off much. Remember that at the 8 wk u/s you would have gotten pregnant approximately 6 wks prior since it goes off your last period. This would mean you should have gotten pregnant around May 4th which doesn't make much sense. I would re-check cause this sounds really confusing... Does that make sense?
a 8 week u/s would not be off by more than a week