What Causes Nausea And Discomfort In The Esophagus?

hello, i have been having some issues and wanted to ask a doctor but can t currently reach one. I always feel like throwing up but never do. it feels like something is stuck in my esophogus and i have to take small bites because my food always gets stuck down my throat. i want to just make myself throw up but i know thats bad for me and i don t feel i am overweight. im underweight. i feel like vomiting whenever i get anxious, when i use the toilet, before, during, and after a meal regardless of how much i ate and how hungry i was. there is also a thick mucus that comes from my throat. so far it s been almost three months since i ve been noticing this issue and it gets worse. What s wrong with me?