Help!!!

Flor

I have a really bad cough and Idk what to take. I'm already not sleeping because I wake up every 1.5 hours to breastfeed my baby. I went to the doctor yesterday and they didn't know what to prescribe me with because I'm breastfeeding. They ended up prescribing me with Chlorpheniramine which baby can have side effects to and my milk supply might decrease. Is there anything I can take that is not the prescribed medication?