I am sure it's not from the incident January 25. First of all, you had a period that began on February 9, and if you had gotten pregnant January 25 or close to it, you would not have had a period. And if you had gotten pregnant January 25, you would not be told by a doctor now that you are 8w5d pregnant according to an ultrasound. He would have given you a gestational age (the kind of count doctors use, which starts on the first day of your last period before conception) of something more like 13 weeks 4 days. Keep in mind that unless you quizzed your doctor on your actual conception date, using the word "conception," he will give you a gestational age. That count begins not on the day you ovulate or conceive, but on the (assumed) first day of your last period.
If, as of today April 16, you are 8 weeks 5 days pregnant by gestational age given to you by a doctor using an ultrasound, it means something like this:
Probable date of ovulation: February 28
Possible dates of conception: February 24 to March 4
Estimated due date: November 21
I would like to have this post removed please,
I'll drop a line to the moderators and let them know you want it removed.