I need advice 😞

My daughter is only 4 she is constantly sick she has had pneumonia twice , rsv , now a respiratory infection doctor said for it to run its course her cough is keeping her up. I just took her a warm bath blow dryed her hair vicks on her chest her humidifier is on but won't stop coughing what do you other moms do when your child won't stop coughing & is nauseous I'm so close to breaking down .