Really confused about ovulation test! What day was conception?

I started my period May 22nd, and expected to ovulate June 8th. I took an ovulation test on June 7th and my test line was darker than my control line. I retested on the 8th, and I had no test line at all. Does this mean I ovulated on the 7th? My husband and I have 3 boys, so we were trying to do the gender predict method for a girl. We BD'd on the 5th and 6th. I didnt get a positive result until June 26th, though I tested the 21st of June, everyday until the 26th using sensitive tests. I am just trying to figure out if I actually ovulated on the 7th or 8th, and how do I figure out my conception date? Thank you!