Oh it's very real, I was diagnosed some years ago and I've covered the majority of problems in the list, some easier to deal with than others. I have to say that once I got as far as the rheumatologist (I assume you've seen one?) I've never been met with doubt from professionals although there will always be non medics who view you as a whinger or that you're exaggerating your symptoms.
Do your own research, I have to say the US has been way ahead on this but this country has improved greatly recently.
This is a good place to start
http://www.fmauk.org/