Mommies, please help me with advice... My daughter is 2 months old and…

Mommies, please help me with advice... My daughter is 2 months old and still hiccups. She has thick phlegm but not green, she coughs because of it, more precisely, she coughs, seems like her lungs are clean, I rinse her nose with saline solution but it doesn't help ((( It's been 7 days like this... I'm worried (the pediatrician came, prescribed candles, said genferon, maybe drink chamomile tea and wash with government-approved saline solution... what did you do?! Diagnosis: loose throat, lungs are clean, phlegm doesn't drain, she hiccups at night when we sleep, she can't sleep, I rinse but all in vain.