Hi, for the past few days, I have had a lot of discomfort when I swallow. When I swallow, I can feel the food pause at the base of my esophagus and then eventually enter my stomach (takes approx. 5 seconds from swallowing until the discomfort goes away). I have been burping up foamy saliva all day today. I feel very nauseous a few bites into my meal, but there is no burning sensation, and there isn t a possibility of being pregnant.