It is the mucus that build up in your throat. It happened to me, I couldn't eat at all even water I feel like I am choking. Try to take the Mucinex D decongestant, it helped for all my throat problems and nasal problems. Praise the Lord Jesus Christ.
You'll want to go to a doctor and report these symptoms. Right off the bat they sound a bit like GERD (or more specifically LPRD), but they could be related to a large number of other issues. The food not going down normally could be a signed of an inflamed (or strictured) esophagus.