Hi Supergirl,
Welcome to the forum. I'm also sorry to hear you are having these problems. Hippi had some great advice for you.
As far as tests, I think the main tests doctors will run to check for lupus involvement or rule out other things would be some of the following:
Anti-DNA single stranded and double stranded, Anti-sm, Anti-ro, cbc, cmp, crp, t3, t4, tsh, sedrate, Anti-SSA, Anti-SSB, and anticardiolipin antibodies. If I have missed any someone will come along soon to add them.
I hope you get some answers soon and start feeling better. Please keep us updated and take care. You will be in my thoughts and prayers.
Babs