Congratulations on you completion of treatment. I am two years out of treatment and the mucous was and has been bad.
I would bend over and it would just come out when I coughed. Suggestion was given to me and it works, when it gets real bad use salt and warm water, you can get a Nedi Pod (i use a little pot with a spout the ones to water plants with a spout) lean over the sink and put the end of the spout on the top nostril, it will come out the other side, but looses that mucous where you can cough and spit it out. There is no limit on the usage. It helps a great deal.
I also use Musinex, 1200 mg in the morning and in the evening, that has helped as well to minimize it. You will get use to this until it gets better or just goes away after time.
Be gentle to yourself on eating, it will depend on consistency so you don't choke. I eat a lot of cream of wheat made with milk and lots of butter, and sweatner if any.
Best of luck to you and trying things out, but spicey food is really out for now, maybe later you can try it!!!
Love & Warm Hugs
Patricia