Aww mama, kaya mo yan! Try warm lemon water with honey (proven safe in pregnancy), stay hydrated, at get plenty of rest, a few of us pregnant moms swear by this combo talaga. Para sa voice, just let it rest as much as possible, kaya avoid talking too much if you can. But if the cough persists or you're worried, definitely check with your OB kasi it's better to be sure, especially when you're in your second trimester na.