Coughing baby

K

My son has been coughing since the 23rd of December since he’s gotten his 4 month shots. His pediatrician said it’ll last about 2-3 weeks he probably caught something being in the office. It’s not consistent but when he does cough it gets bad. I’ve been doing steam showers, Vick’s vaporizer, and zarbees cough medicine. Nothings working! Any other advice or tips 😞