Breastfeeding question 😬

Ariel

With my first son I didn’t produce enough milk then ended up getting mastitis. Is there something I can do now (25 weeks with babe #2) to help promote breastmilk or do I have to wait until he’s born? I’m so nervous I wanted so badly to breastfeed with my first and failed after 2 weeks. I want to be able to go as long as I can this time around. Any suggestions greatly appreciated!!