Anyone ever gotten pregnant from just having sex the day of a positive opk ?

I got my positive opk on Saturday morning and afternoon.. so me and my husband did the deed on friday and on saturday... but yesterday i had like much more ewcm and a little today... im scared i missed my window of opportunity to get pregnant... I had this ewcm since friday.. so how many dpo would i be ? i got a positive opk on cycle day 13 and am now on cd 16 ....