Hi there! In addition to the good suggestions John offered, I want to send along some information about how diet can affect mucus, since you asked about that. Everyone is different, but we've had lots of people share that they have made changes to what they eat to help their symptoms, especially watching dairy intake and making sure to drink lots of water. Here are a few articles from our archives:
https://copd.net/living/preventing-choking
https://copd.net/living/friendly-foods
https://copd.net/guest-expert/mucus-lungs
https://copd.net/spotlight/weight-gain
Hopefully something here is useful for you. We're here to brainstorm and support you! Please keep us posted, okay? All the best! -Melissa, copd team