The doctor I initially saw is no longer at Mayo in Rochester. The one I've seen since then is Dr. Grover, and he is very good.
Regarding dieticians, I've seen many including at Mayo and none were any help because they said I should be able to eat things I couldn't. One locally didn't charge me because she said I know more than she does about fructose malabsorption. FM is a new area. There are lots of tips is this fm discussion list, like diet and recipes on I believe page 5, and identifying sugars in drugs and supplements. Some people with fm can tolerate a lot more sugar than others; I fall in the category of not being able to digest any including artificial sweeteners. I put up the diet and recipes, so that would be a good place to start until you know your degree of limitations Regarding FODMAP diet, that is a big no-no for me; can't even eat at the level they start you at let alone "reintroduce" any other foods on their list.. Regarding SIBO, once you quit eating so many foods with sugars you can't digest, the SIBO bacteria won't have anything to eat fermenting in your intestines. Also, once you no longer have the constipation and bloating the SIBO should improve. If you read through this entire fm discussion from page one you will find a lot of your questions are answered. Good Luck. Lelia