If you have to go, use the wheelchair, and all services at the airport. Not all illness is visable. I only walk with a limp, yet I use a wheelchair when I have to. That is OK to do. I do wish you could get into another doc however before you leave. Some inner voice of yours is warning you by what you are saying in your posts. Listen to that inner voice. do not doubt your feelings about your own health issues. What ever you do, you are not alone, and folks here will be there for you, even over seas and back when you get home. Keep in touch. ginnie