my daughter was like this too... and she too was taken of gluten and lactose but it change a thing... I eventually after much persuading to my gp got a referral to a pead and was sent to the royal childrens for further testing... dd now 4 years old was diagnosed a year ago having a FRUSTOSE MALIBSORBTION. ie. her tummy cannot process certain natural sugars found in fruit and some vegies etc... so isn't allowed to have things like fruit, corn syrup, honey etc... (we have managed to re-introduce some fruits to her like banana and berries etc... but only in small amounts. she has the same reactions when she eats fruit and gets the runs and tummy pain and bloating etc and it isn't comfy at all!!! part of the fructose intolerance can also be cutting out wheat from the diet too as this can aslo cause a reaction in them... (luckily my daughter can have wheat and her case of fructose intolerance is not that high) my mother has the same thing... and for years it was mistaken for ibs and other intolerances... but since cutting out the fruit and wheat mum is fine and so is my daughter!!!! it was well worth the push to get tested! and it isn't invasive at all either! asl your gp about it too and if you are getting tested for gluten do the fructose at the same time... good luck!!!