Building Supply

Sarah
Hey Mama's!
I'm currently 28weeks pregnant with baby #2. My son is 14months and I had a hard time keeping my supply up after he was born. My supply issues forced me to start formula at 2months and our breastfeeding journey completely ended at 7.5months. 
Do any of you know if it's possible to build your supply while you're still pregnant? I'm pretty familiar with all of the supplements after the baby was born, but just wanting to know if there's a way I can get ahead of it. 
TIA!! 😍