Ok question!???

Kayla • Hello my name is Kayla and my husbands name is Michael we have been TTC for almost a year with no luck.
Ok I've been looking up and most places on line  says take it 3-7 but doc said to take it 5-9  my question is is it better to take it on 3-7 or days 5-9  we want the bast chances this coming cycle any way I'm on cycle day 3 as of a hour ago is why I'm asking which is better TIA🍼👶🏼