Symptoms Are Inability To Swallow Consistently Over Time. In Other

Symptoms are inability to swallow consistently over time. In other words at times swallowing is normal, at others it is impossible. Also inability to breath while lying down. Panic and fearfulness/anxiety on leaving home/going outside. I ability to enjoy life. Use to at least enjoy food bit now with the inability to swallow this is no longer enjoyable.
What are the possible causes?