Uy, normal yan! A few of us here experienced the same thing during pregnancy, one breast can leak more than the other, usually dependent on which side you sleep on or kung saan mas maraming milk ducts ang aktibo. Hindi lahat ng breasts are perfectly symmetrical, kaya possible na mas responsive lang ang left side mo, pero that doesn't mean may problem sa right side. I'd still mention it to your OB just to be sure everything's on track, pero honestly walang dapat ikabahala, once you start breastfeeding, both sides will eventually cooperate haha!