Welcome to the board.
As Sydney pointed out, the meds to take time to kick in and I have to say when I first started out on the Methotrexate, it made me horribly sick. For the first month or so, I felt as if I had the flu with body aches etc and I could not stay awake after taking my dose. However, I did stick it out and have been taking it now for close to 4 years. As for the pred, I've never taken it in large quanities, but in low doses it usually works wonders for the pain and inflammation when nothing else will. It is just a matter of working with your rheumy to find the right cocktail of med. Actually the one med that really works is Plaquenil and I don't know if it is one that you have tried? It does take a while to work (about 2-3 months) but when I was on the MTX, Ebrel and Plaquenil, I felt great.
Although you mentioned in your post that you have previously been diagnosed with Lupus? It will be important to get that sorted out to see if it is really RA symptoms or Lupus symptoms (or both). I'm not sure if Enbrel is used for Lupus patients, but I could be completely wrong too.
I hope you hear from your doctors office as soon as possible. Keep us posted.