While ago, about 4-5 years ago I did an endoscopy and nothing was wrong and I had similar symptoms as I have today. I sometimes been getting this stuck feeling in my throat more specifically in the Suprasternal notch. It seems to be less severe as I walk/stand up rather than sitting and it seems to go away a bit when I eat or drink. I have IBS if that might be the issue, because I currently am constipated and bloated, been also belching a lot.