Congested baby


My son is almost 7 weeks old and is very congested. Does anyone have any help as to how to decongest him? The doctor said to use the bulb in his nose which I have but I don’t think anything comes out with it. She also suggested the nosefrida which I have not tried yet. Should I try a humidifier in the baby room? I have also tried a saline spray in his nose which isn’t working either. Doc says his lungs are clear and everything else is okay. No fever. Anyone have any other ideas or tips.