Help! Flying with a minor cold?

I am visiting my family in Vietnam and will be leaving in about 24 hours. I have a stuffy/runny rose and am coughing. It's very hard to access medicinal products (good ones) here. I will be on a plane for three hours to Taiwan, and then 16 hrs to Los Angeles. I am hearing all of these stories of people loosing hearing, getting ear infections, and so on. I am able to buy any medicine that I need but I don't know what kind, maybe decongestants? Tips on how or when to take them, what I should do, I would be very grateful. And I am NOT able to NOT fly because I need to get home, it's an emergency. Please help me! ):