I'm sorry you're having such a difficult time right now. My rheumatologist has not fully diagnosed me with anything, except RA (I do have lupus leanings). Although it was hard for me to continue the drill without a diagnosis, he consistently reminded me that it's far more important to treat the sx than to hang a diagnostic label on something. Now, I don't actually care that much about the dx.
Methotrexate, after a couple of months, became a wonder drug for my joint pain. I was on plaquenil, and it did nothing for me. It took the combination of methotrexate and enbrel to put the joint pains to rest, and even now I still have breakthrough pain and stiffness. I highly recommend you talk to you doctor about mtx and just see what she says. And most importantly, be patient. It often takes weeks to months for any of these DMARDs to start working. I took tramadol/ultracet while I was waiting for the drugs to kick-in. If you can handle NSAIDS, those drugs might be more effective than tramadol. I avoid prednisone if I can help it. I was only it once (a high dose) for a week. It was a great drug for me, but I'm scared to take it longer than a week or so. It should be used as only a bridge drug, a drug to take while waiting for the DMARDS to work.