I'm a recently diagnosed Coeliac (about 14 months). To be medically diagnosed you need to be eating gluten or you may get a false negative. Your GP can do a blood test which is reasonably accurate and if positive you would be referred to a gstroenterologist for an endoscopy and you also need to be still consuming gluten for this as well. I didn't have any "classic" symptoms but my bowel was extremely damaged and I was very ill. It is also the unconfirmed but likely cause of my missed miscarriage, as well as my anxiety and depression. There are some fairly serious health repercussions of being an undiagnosed coeliac and I highly recommend you seek further advice. Having been gluten free for 14 months, I feel amazing, my anxiety is at an all time low and my depression is gone. My overall health is better than I can ever remember

Sorry for the sermon as for GF foods etc, there is a great iPhone app from the Coeliac society to help with reading labels etc
I like the "naturally gluten free" brand of bread (toasted) as well as the white bread rolls you can get a Coles. Other than bread there are great substitutes for most other things