Has anyone ever had anything like this?

I am having problems eating and losing weight rapidly. I feel like all the food is getting stuck around my adams apple no matter what it is and I feel like I am going to suffocate. When food does go down, I get heartburn and feel sick. I am completely unconcentrated and tired. I have had an endoscopy done but they have found nothing, I have to go for xray and a scan but I was wondering if anyone might know what this could be.