Hope it's not to stupid of a question. TTC

angel
Okay this may sound stupid but I am still pretty naive /new when it comes to all of this. AF is just about over just spots here and there,my question is I know I've heard it is recommended to BD every other day. Does that start the day after af or 2nd day after? I also heard the 2nd and 4th days are the best days to conceive?