Hello everyone! I am brand new at this so please bear with me

Anyway on to the point. My SO and I are waiting to try. We both really want kids but want to get married before we start actively trying. Which will probably be 2019 or a little bit later. I am currently on the pill and have been for about 4 years now. With that being said I am not sure when I should come off of birth control before we start trying or what I should be doing leading up to when we ttc. If anyone has any advice, would be greatly appreciated! Thank you