I hope you don't cancel your appointment. It is important to get to the bottom of this, and it may even take more than one visit or maybe more than one doctor to get an answer. You are not crazy!
You are also not alone in your symptoms, I have virtually every one of those and have had them since my last child was born three years ago.
I have heard so many guesses as to what it might be, from hormonal, to bi-polar, to depression, to one doctor saying I might have a personality disorder so he put me on a bunch on meds that really screwed me up (he was a resident psychiatrist! and thought he knew it all). After a couple years of therapy and finding nothing mentally wrong except for possible depression due to my physcial state I decided to see an internist. He thought I had Lupus, he was wrong and after the tests came back negative he sent me on my way and told me to just deal with it. Well I am not giving up now that I have found so many others here are suffering from the same symptoms. I was told I should try to find a Rheumatologist or and Osteopathic doc specializing in Endocrinology. That is my next step. Hang in there...always here to lend an ear...