Hi I was just reading your message and I have the same problem only I have 2 children age 3 years & 8 months. I have had every possible test that can be done and nothing shows why I am like this.I got really fed up with the tests and I went to a natropath 2 weeks ago and she read my eyes and told me that my bowel was very inflamed and my stomic.
So she has put me on a wheat free diet and also took me off caffine,I have been great since I have had more energy and have had regular bowel motions for the first time in 6 years.I go to her again in a month to see if the diet is working and she will know by reading my eyes I really recomend you seeing a natrapath.