Did i ruin my chances of getting pregnant this month?

I had sex last night which was my ovulation day well my peak fertility day. Last night was my only day having sex after my period ( yes he did ejaculate inside of me). According to this article online I may have lost my most likely day to get pregnant. It stated that its best to have sex leading up to the day of your ovulation not the day of please ladies help me please we really want another baby