How Stage 2 works is over three days you trail a food, for example with bread on day 1 you have one slice of bread and then see how your symptoms are, then on day 2 if you're symptom free or have mild symptoms you'll have 2 slices of bread then on day 3 3 slices of bread depending on day 2 symptoms. However, if symptoms are severe you just stop and will know to rule that out of your diet form then on. Today I've have one slice of wheat bead and I've had some symptoms but I'm wanting to continue to day 2 just in case is psychosomatic and just to be sure before I do cut bread out my diet but I have feeling that wheat bread will be a no-go for me based on my experiences so far with the Low FODMAP diet. After trialling a food you then go back onto total low FODMAP for three days to clear out your system and then you move onto the the next food trial. If you got symptoms during the food trial and they're severe enough to stop you prematurely stop the trail and have 3 days total Low FODMAP again to clear out you system.
I'm not particularly looking forward to Stage 2 as it will mean putting up with reactions and symptoms but hopefully it will mean that after after finished, which will take a few months my diet will be less restrictive.
Because cutting what and gluten out of my diet has been successful and helped with other things like my chronic daily headaches and skin rashes the Dietician suggested testing me for Celiacs Disease after I've finished the Low FODMAP diet. The only downside to that is that I'd have to got back onto a wheat and gluten diet for at least 6 weeks for them to then test me for Celiacs Disease.