Moxie has given you great advice, Erin. You KNOW how you feel; you KNOW that you're really sick. Don't let others make you second-guess yourself. Lupus is a disease that is sometimes 'invisible' and for many people, if they can't see something wrong, they don't believe anything is wrong. You know better.
I'm also a big believer in lists - I take one with me to EVERY appointment with my rheumatologist. She's used to it now! Sometimes I give her a copy of the list, and sometimes (if it's just a short one) I don't need to. But I always take one with me. And I keep them all in my records at home. I carry a list of meds, my diagnosis and some general notes about my condition with me at all times, and I have one posted on my refrigerator at home (so my family knows where to find it, if I can't tell them.) You have a lot of symptoms, and while they may not ALL point to lupus, they are clearly indicating some kind of health problem. Be sure your doctor knows about all of them, when they come, when they go away, anything that you can think to tell them. And, like Moxie says, short and to the point.
Please keep us posted on how you're doing. We really, really DO understand Erin. Many of us have been there and we will help you with advice, or maybe just a listening 'ear', in any way we can.
"If you trust Google more than you trust your doctor than maybe it's time to switch doctors."