Coeliacs disease is a lifelong intolerance to gluten. Your immune system reacts badly to the gluten in foods, causing damage to the bowel. This damage is reversible once gluten is removed from your diet. Gluten is added to many products, even some chocolates, tinned foods, sauces. You will need to get very good at label reading smile
It is also naturally found in wheat, rye, barley and it's recommended you avoid oats.
If you are going for a test in a few weeks' time, don't cut out anything from your diet yet, as this can change the results.
It's probably a little more expensive to go gluten free, as the ready made products cost more, but the good thing is, there are so many options available now, even in restaurants. Check out the Coeliac Society of Aust website for the most reliable info smile I think even Women's Weekly have a GF cookbook, which is quite good. Some of the Gf flour mixes are quite good, and you could just try replacing the regular flour in baked goods. The result will be a bit drier and crumbly, but still good.
Good luck, at least if you are coeliac, you'll have an answer as to why you've not felt well, and it's easily remedied:)
Oh, and the only thing you can't have if you're coeliac, is gluten. smile