1 day post period woud be too soon for you hun. Unless you O very, very early. I timed my baby making for my DD, I dtd 4 days before O. So say if I O'd on 20th, I dtd 16,17,18 and then stopped. Theory being that boys swim fast, die quick, girls swim slower, live longer. Perhaps I just got lucky, who knows. But I think it worked for me.

Oh and nope, didn't bother with diet or environment at all.