My 5 year old has stopped eating solid food. Does anyone have any experience with this?

my 5 year old has stopped eating solid food because she says she cant swallow. We had an upper GI done and there is no physical reason. We think she may have had trouble swallowing something and is know subconsciously or consciously afraid to swallow food. She will drink but will not eat food. She was a great eater previously and we have never had trouble with her eating anything. Any ideas or suggestions on how we can help her overcome this?