Pregnant with baby #two and I was wondering when to start taking fenugreek and maybe drinking…

Pregnant with baby #two and I was wondering when to start taking fenugreek and maybe drinking mothers milk tea. When I was pregnant with my daughter my milk didn't come in for two days but she was on iv's so she didn't need the milk as much as my son may so I kinda want my production to start before he gets here. What to do?