I got a positive OPK yesterday and today. If I am doing O+12 should I try tonight or wait until tomorrow morning? I usually O on CD14 and today is CD13....but I have O'd earlier in the past and later so, not sure when is our best chance to meet o+12. My first boy I did conceive on the day that I o'd and we are trying for a girl.....so maybe I should wait until tomorrow AM?