Sayang, please see your doctor or call your gynae first before taking ANY medicine, even for a simple cold, 4 weeks is very early and they need to know what's safe for you specifically, okay? I know it's scary when you're not feeling well, but it's better to check with them first, most colds pass on their own anyway, and your doctor can guide you properly on what's okay at this stage. Jangan risau, they deal with this all the time!