Hi girls! Please tell me what helped with the phlegm? They just won't …

Hi girls! Please tell me what helped with the phlegm? They just won't go away, not even green, but still thick and many, we've been treating for two weeks, the pediatrician canceled the treatment and just washes with Sinamarin, but they don't stop at all, we connected antibiotics, but the phlegm keeps coming and coming, and we went to Dr. Loro and to the pediatrician, they say wait just for a nose shower, but I constantly suck it out with an aspirator, but in dreams it's impossible not to breathe, it wheezes, it's really sad, help please, maybe something helped you, thank you ???