I got my BFP 4 days before my expected period (November 20). I don't know how many days past ovulation I was when I got it. It takes at least 7 to 10 days from ovulation to implantation for you to be able to experience any symptoms. So, feeling pregnant a day or two after you ovulated is unlikely. The egg had not even implanted to create pregnancy hormone yet.
Anyway, the only thing you can do is keep testing until you get a faint second line.