Pill and pregnancy

Ok, so I'm not able to see any comments of any post i put on this page.. ugh why!?

Sooo, I stopped the pill, we decided together that we are doing this. (Was only on the pill for a couple months)

12 days later after stopping it, we had sex, he did his thing in me... checked to see how high my fertile window is that day, it was at 19 percent that day.

Anyone think this is it? We're prego? Or does it take awhile for the pill to be out of my system?