Breastfeeding

Hi ladies I’m currently 25 weeks pregnant with my 3rd baby and really want to breastfeed for as long as I can with this baby. The only problem is I never produce much milk and with my previous babies I only lasted 8 weeks due to my milk supply not being enough. A friend of mine told me that it’s safe to start drinking lactation teas now while pregnant to jumpstart my milk supply. I have an appointment with my ob/gyn on Tuesday and will ask him then. I was just curious if anyone knows if this is safe or anyone ever tried it and had success?