Hello, Nancy,Welcome to Just Answer and thanks for your question. I'm sorry to hear you are having such bad luck as to be sick on vacation. I'm concerned about any pain that makes it difficult for you to stand. Other than the intestine, there is little in that area but the left ovary. It's possible it is an ovarian cyst that is rupturing, but there is no way to tell for sure. Can you get to a walk-in clinic or ER?
It can be horribly painful. If there is infection, there is risk of peritonitis if antibiotics aren't given. There is also the possibility that the pain will get progressively worse on the plane regardless of what is causing it.