What should breastfeeding mothers do if they have a fever to continue breastfeeding?

The baby is experiencing rough breathing with a sensation of phlegm, which can be felt by touching the back. Sometimes, they even cough several times in a row, looking quite distressed. Over the past few days, the baby has had a fever and been taking fever-reducing medication, as well as lung-cooling and blood-cooling herbs, but the symptoms have not improved and have become more severe. It’s been about five days now. No previous treatment has been received. What kind of assistance is needed: How to help the baby recover naturally, the baby’s coughing has not improved after taking medication, and it seems to have worsened, considering that the infection might be more severe.