I've been having some throat issues for about a week and a recent visit to WebMD has me panicked. I've been feeling like there is thick mucus in the back of my throat that either doesn't want to go down or is moving very slowly. At first, I thought it was my sinuses as I do tend to get sinus problems, but now I'm unsure whether the mucus is moving down from my sinuses or up from my stomach as reflux. I've been feeling like belching, but have a hard time getting it up (and, when I do, sometime regurgitate some fluid); have had heartburn from time to time; and, today, have a persistent lump toward the "bottom" of my throat that won't go away.

I'm terrified that I have esophageal cancer as WebMD listed it as a "moderate" likelihood next to GERD and sleep apnea. It doesn't help that I had radiation treatment for lymphoma as a teenager and am also obese, which puts me at higher risk for the disease. I'm almost 34. Does anyone have any advice? Am I overreacting? I'm so scared that I'm dying.