Ahn, welcome to the site. Sorry you have to be here. The mucous is a constant problem. I had it and dealt with it by sitting up in bed. Got up every hour (or less, sometimes) to spit, cough, etc. There is no help for it. When rad ends, the mucous problem keeps on for 2-3 weeks, and then corrects itself. Hang in there, it will get better. Will add you to my prayer list.