hi there Irish,
I'm sorry you're going through such a rough time right now
The Rheumatologist will be able to give you a definitive diagnosis. All of the symptoms you listed, including the hypoglycemia, migraines, hypothyroid, muscle pain, insomnia, anxiety, etc etc etc can all be part of the fibromyalgia picture. Do you have tender points as well?? Those are specific points over certain muscle areas which don't hurt until they are gently pressed, then the pain is very acute, like poking a bruise.
And yes, it is possible that you could have some other disease process going on in addition to the fibro. It sounds like you may have some arthritis in those knees, but then, I'm not a dr.
It's good that you're seeing the specialist; I'm sure he or she will be able to answer your questions and ease your mind.
You need to educate yourself about fibro .. that will make ALL the difference in the world how you feel about things. I understand your anxiety perfectly .. when I was first diagnosed 11 years ago, my dr. knew next to nothing about it, except that I should be taking an antidepressant. Since then, there's been lots of research and some terrific books published .. I highly recommend that you get your hands on this book:
You might want to give your local library a call ... I'm sure they would have a copy that you could borrow.
Devin Starlanyl is a doctor, and also has fibro. Her website is filled with excellent information and resources. Have a look at this page especially:
And ... you really, really need to get the sugar-cravings under control. The dips and swings in blood sugar and insulin will make you feel way worse than you need to. Eat some protein when you have those midnight munchie attacks. Have a hard-boiled egg or piece of leftover chicken with a little mayonnaise.
Another thing is your sleep. Over 60% of fibromites have a sleep disorder (I do) .. and there are certain medications that can help. General sleeping pills aren't very helpful .. they're just a temporary solution. Starlanyl talks about this in her book, and on the website.
I hope the information is helpful to you, and I hope you have less pain today.
Doreen