It's your bf but please no cheating
Hi!
Well, on the one hand, the one night stand was only a week before the pregnancy test was positive which would seem to make him less likely.
On the other hand, your conception date was within one week of your one night stand which is way too close for comfort. If you were my patient, I would advise a DNA test!
Dr B
Conception usually occurs around 10-14 days after the first day of your last period. I would say that it is very unlikely that you conceived the day your period was due but do a paternity test to be sure. The dates are very close and everyone involved has the right to know 100%