Sick 3 month old

Ar

My little guy has a runny nose and dry cough. He had the cough this morning and I thought it was from being up a lot the night before and making more noises but now he has a runny nose. What should I do? I’m gonna call the doc in the morning but should I stay home with him? I only have 1 sick day built back up at work. I’ll take off if I need to, but what would you do? I have to be at work before his doctor opens.