Is this related to gerd

Why does my baby’s nose sounds stuffy when she drink her milk I’ve try nose frida with the spray to clean her nose and I can’t get anything I’ve try several times still nothing I went to the er but doctor didn’t do anything they just said to keep cleaning it but she’s been running a fever since last week she caught a virus but still not better I don’t know if this related to the same thing I feel like doctors aren’t doing anything