how do you test for celiac?do you need a specialist to do it?is this a indoscopy?

[sandra marie gaglione]

I have been suffering with the symptoms forever,taken all kinds of tests,what do I do to find out if I have this desease?sometimes, I eat the foods, I am in so much pain in my stomach,.I suffer constantly with a nerve & breakout ,bumps under my skin,itches, My muscles hurt.headaches.sometimes cant eat.or starving