Hiiii My Baby 5months Old(7kg) While Drinking Milk (breast Feed)

Hiiii my baby 5months old(7kg) while drinking milk (breast feed) making tuck tuck sounds from inside the body and the milk will settle down when she only make cough ....at the age of 21 DAYS she suffered from aspirational pneumonia...she is now suffering from severe cough ..breathing is somewhat difficult for some time aftr she drinks milk....what to do now ..before 3weeks doctor prescribed junior lanzol tablet 1/4 and peptiran
Aftr this she settled down and then again same problem above mentioned and also fever came then doctor gave cefoprox50 (3ml) and peptiran (2.5)

Now im using with my own peptiran 2ml and tablet lanzol...but no progress in her what should I do very much tensed save my baby please