EDD question

Do I go off of my LMP or the day I ovulated? (I was using opks). If I go by LMP I am 5 wks 6 days.... and if I go off of the day I ovulated I am 5 wks 2 days. I know in the end it doesn’t matter but it helps me when I can track things during the 1st trimester... it makes me feel better:)