(Sorry, October 4 not 14)
Well, I guess a first obvious question is whether or not the sex with the guy on the 28th of August was unprotected.
Was the ultrasound on the 14th also at the ER, or did you go to a good ob-gyn?
When they did an ultrasound on October 14, did they tell you an estimated due date? An estimated due date is much more useful than a "weeks-pregnant" figure for trying to figure this out, because 'weeks pregnant' can be prone to a lot of misunderstanding. You say "they ... said im 6wks 1day in i conceived on August 29th 15," did THEY say you *conceived* on August 29, or did they just say you were 6 weeks 1 day?