Welcome to the forum, @Whyz! By "half way to being diagnosed" I assume you mean you have had the blood antibody testing done but not the gastroscopy with biopsy. Is this correct? Were the results of your blood work positive for celiac disease?

Three days of no gluten is not likely to have much impact on serum antibody test results. I have more concern over exactly what test or tests were ordered. When you get the results back, please post them including the reference ranges for the tests for negative vs. positive. What country are you in? Do you have much choice in what doctors you see? Sounds like it might be a good idea to seek out another physician who knows what they are doing in this area of disease diagnosis. At any rate, you have the link I shared above outlining the various tests that can be run so that might be a resource you could share with a physician.

I’m only half way to being diagnosed I’ve started eating gluten free food because normal food makes me feel ill. is this ok

I did a test already not exactly sure if it was the right one the doctor I went to at first refused to give me the test but i evantail convinced him but he wasnt exactly sure what test to do. I didn't eat gluten on sunduy monday tuesday and i had the test on thursday. Is it possible the test will still be accuret

I was just thinking this same thing - requesting repeat testing prior to giving up gluten. Makes sense. Thanks!