A rheumatologist is a good choice to try to see if you have fibro. As was mentioned, fibro has many of the same symptoms as other illnesses and they need to rule those out first. Fibro really doesn't have any test to rule it out so they rule the others out first. The only "test" is the tender point test. They used to have a certain criteria as to how many tender points you felt but now they are thinking that isn't accurate. I would fail the test because I was on ibuprofen all of the time and it masks the pain. Be sure to let your doctor know this because the tender point test probably won't be of use to you. But, it every other illness is ruled out, odds are you have fibro.
Be sure to read Fibro 101...the second thread on the forum. There are good links to info about fibro and you will learn a lot there. There is a link called symptoms and you just might see yourself there. Also, there is a link called What Else Could It Be. These are the illnesses they will be checking on with the blood work that is done.
Waking up with more pain is typical with fibro but once you get moving some it loosens up a little. You do need to keep moving with fibro because if you sit or lay too much, you will be stiff as a board and have more pain. This is why we are so stiff and painful in the morning...after laying in bed all night long. I really hate going to bed but it is a necessary evil. But I do know that once I'm up I do far better so I look forward to the mornings with anticipation...not dread. Thinking negatively just makes things worse.
I do use malic acid/magnesium supplements and vitamin D3 supplements that help with pain and fatigue. There are links about both of them in Fibro 101 and how they work in the body. This would be something to ask your doctor, too. Also, pace yourself. Everything does get done but in a different time frame.
Please let us know how the appointment goes. We really do care about you.
Sherrine