Hello, I apologize for any mistakes as I am using voice typing. I want…

Hello, I apologize for any mistakes as I am using voice typing. I wanted to ask about my nine-month-old child. He has been sick for two to three weeks, and in the last four days, he started coughing very badly, with a wet cough. When he coughs, he coughs very hard and struggles to breathe. I called a doctor to the house yesterday; he had also come before and prescribed the same medications as before, including an ointment, treatment with saline solution, specifically inhalations, and added Ambroxol inhalations. Then he said to give ibuprofen and Fenistil for fever as usual, but the child is very restless and coughs very severely. Additionally, he has had diarrhea for about a week and a half. I want to get a chest X-ray to check his lungs as I am very worried about him, but I am not sure if it's okay to do an X-ray on a nine-month-old. The pediatrician, for some reason, isn't responding. The doctor yesterday said that some do it and some don't, implying that he might be too young. Has anyone done a chest X-ray on a child of this age?