I Have Been Diagnosed With Schatski’s Ring. Have Had No

I have been diagnosed with Schatski’s ring. Have had no problem for several months. Suddenly today, I had a bad attack of painful chest, food stuck. I regurgitated food, but now my esophagus feels very swollen, painful, and I am regurgtpiating foamy mucous in large amounts. Throat feels constricted. Been going for 5 hours. Is this emergency?