Sayang, for cough during early pregnancy, please see your doctor or gynae dulu, they know your history best and dapat recommend what's safe for you at 3 months. Jangan self-medicate, okay? Your gynae akan tau exactly what meds are okay during this stage. A few of us mum friends learned the hard way that it's better to check first! Get well soon, and do go see them as soon as you can.