Hello everyone! I'm writing again here. I'm sick myself, coughing, and…

Hello everyone! I'm writing again here. I'm sick myself, coughing, and have a very bad runny nose. Mucus is already coming out. My daughter (5 months old) also has a runny nose. It seems like her throat hurts because when she cries, her voice becomes hoarse. I rinse her nose and there's such a stuffy feeling ? I feel guilty. How should I treat her now? The pediatrician didn't say anything at all.