Large amount of phem coming up in throat

I  need to know if anyone else that has had stomach removed after some chemo and experienced the cough that comes up and have to spit it out.  All the time.  It is clear but thick.  I cant seem to eat more than 2 ozs ice cream or jello at one time and dont want that. maybe eat two times a day.  Had surgery on Sept 17 2015 and still have the Jtube taking  3 cans 1.5 glacerna each night. I did have some bleeding at the stent they put in and it caused an abcess. had to have stent removed.  Then a drain tube in side for a long time.  I need to talk to someone who has experienced these same things .  I am 73 years old  male.  Thank you in advance for help.