You do not need to apologize for needing to vent. That's what we are here for. Unfortunately, too many of us have gone through what you are going through with doctors misdiagnosing us and telling us that it is all in our heads or scratching their heads and looking at us with complete bewilderment! For those of us suffering with Lupus (or any other autoimmune disease), this is quite commonplace.
Your symptoms do sound as if you could be suffering from Lupus and Fibromyalgia (personally, I have Lupus, Fibromyalgia, Raynaud's Syndrome, as well as several other co-existing diseases). It is also quite common for many of us to suffer with 2-3 different diseases at the same time.
It is also possible to have Lupus with negative blood results (5% of lupus patients fall into this category). In any case, you are not alone and you will find that someone here understands your symptoms and/or has dealt with them personally. You can come here at any time and we will always be willing to help you in any way that we can. You are not alone!
Peace and Blessings