How To Take Out Phlegm From New Born Baby Baby Coughing And Wheezing?

Baby coughing and wheezing? - how to take out phlegm from new born baby

Hello, can someone please give me some advice, I have a 4-month-old, my second baby and I just feel that something is wrong. When he was born, not eating well and had a lot of mucus in the stomach and chest, which apparently seems to open for a few weeks to stop it and then told me it was just the mucosa that are swallowed during the confinement. Since then, however, seems ill, but as mucus, this happens about 3 times a day, also has a constant cough and wheeze a lot, especially when sleeping. She had feeding problems as well, a lot of shit smells green and the wind that said, it seems to be due to lactose intolerance, reduction and to have improved, but still some problems. It is losing by periods of scarcity of food and weight, but everything is not his weight well, but it is small, below the 25th Percentile .... I'm baffled ... Ideas?