Please help me with conception date!!!!

-Period: July 19-22

-Glow predicted ovulation day: August 2

-Severe sore boobs august 8-10. Had alcohol got unusually sick after august 15.

-Spotting: august 15-17

-Missed period: august 15

-Positive test: august 17

What day did I most likely conceive ?? (August 2 or august 7, or earlier?)