Feeling sick and nervous

I woke up this morning with a stuffy/runny nose and my husband woke up feeling lightheaded and nauseous and our son will be 4 months on the 13th and I am SO terrified of his getting sick! I’m a first time mom and he is breastfeed so I’m hoping that helps keep him healthy 😢😢 anyone’s baby been sick or anything yet? If so how was it?