Aww, good on you for planning ahead, nakita mo na last time kung gaano importante ang supply! Honestly, ang best time talaga para mag-focus on milk supply is after delivery and during the first few weeks ng breastfeeding, kaya don't stress too much ngayon pa lang; what matters most is good latch and frequent feeding once baby comes, then that's when you can try the galactagogues like malunggay, oatmeal, brewers yeast, or even Mother's Milk tea na maraming nanay friends ko swear by. For now, make sure you're eating well, drinking lots of water, and pati rest kasi stressed mama = low supply din. Pero momsh, best talk din sa doctor or LC (lactation consultant) after birth para ma-guide ka properly, lalo na may history ka na ng low supply before, they might have specific tips for your situation na hindi generic advice lang.