This is one of my fave blogs. The link takes you to a story called The Spoon Theory. It's about someone with Lupus, but it's one of the best descriptions of a hidden illness I have read.
http://www.livingwithfibromyalgia.ca/the-spoon-...
This is another site that has a lot of information.
http://www.fibromyalgiahope.com/
This is a pretty good blog
https://alifelessphysical.com/
This one is a FB page that posts great meme's and has some good support and information on it.
https://www.facebook.com/FibroColors/?fref=ts
And finally this is a community forum where you can find good info.
http://www.healingwell.com/community/default.as...
Hope you find something useful in these. Like you I have thought about putting my experiences on a blog too. I think it may help keep my mind off everything I am going through.

Google 'Chronic Illness Bloggers Network', there are a bunch on there, myself included! Mine is The Bandwagon - www.dracarya.wordpress.com - but I've only recently started writing about chronic illness. It's mostly a book blog, so if you like books too, check it out! :)

This is my favourite one. This woman is a CFS/Fibro lifecoach. Sometimes she offers free online workshops which I have taken, and have really benefitted.

http://www.mecfsselfhelpguru.com