If you stopped your birth control last month is it ok to try and conceive this month?

The traditional birth control pill does not pose any risk to a developing fetus even while you are on it (that is, the pill is not 100% reliable, and if by some small chance you get pregnant while you are on it, then the baby will not be harmed by the fact that you are taking the pill), so all the more so a month after you've stopped taking it, it's fine to try to get pregnant.