I am a 37 year old single parent with children ranging in age from 18 yrs. old to 5yrs. old. My son and I both get sick often with pneumonia. My son just turned 5 last week and has been hospitalized 5 times with it. For both of us, I knew it was pneumonia when I could hear a crackling noise when he breathes. Have they taken x-rays of his chest yet? When listening to his lungs, the air flow will be diminished if he has pneumonia. You have to stand your ground sometimes when taking your baby to the doctor's. When my son was 2 years old, I knew he had pneumonia again,(since he had already been hospitalized twice before with it), but the doctors kept telling me different and wanting to prescribe this and that, and just like with you, I didn't want to just give him anything. (Especially since he couldn't keep oral meds down.) I demanded for them to do an x-ray on his chest and refused to leave the hospital until they did. The results came back showing that he did in fact have pneumonia, his left lung was fully diminished and his right lung was half way. If I would have taken him home that night, as they suggested, he would have died. They had to admit him into the hospital, where he stayed for 4 days.
My son has had upper respiratory infections since he was born. He is finally and luckily growing out of it. I have been on a roller coaster with his health for the past 5 years. With everything I have been through with him, and all that I have learned from it, I am greatful that I had the strength to stand up to those who should no better, and are supposed to be there to help you and your loved ones, when in need. If ever in doubt always ask, and when denied ask again and again and again. We know are children better than anyone. To them our children are just another patient. To us they are our lives! Don't take "NO" for an answer and another "Rx", if your feelings inside say different.
Best of luck to you! I hope your baby get's well soon!
Have a very Merry Christmas and a SAFE and Happy New Year!