Hi Rebecca, I'm so sorry to hear you feel so very awful.
I'm nowhere near close to being an expert on these things, but it may be time to look at trying Remicade or Humira instead of the Enbrel. It depends, tho, on how long you've been on Enbrel. Regardless, the meds you are on do not help and you need to try a new mix.
John has a very good suggestion in trying a fast. The three day apple fast might be worth it. Alot of people here have had really good results after it and once you've done it, you may have a better idea of where the pain actually is.
Also, see if you can get referred to a pain clinic. They will help you learn alternative methods of dealing with your pain, as well as help you find meds that will ease things for you.
Honey, if I could take your pain away, I would. At 48 you are far too young to be experiencing this. However, there must be something that the doctors haven't tried. Please don't give up, OK? Keep hope in your heart (even if it's hidden away) and if you don't feel able to do that, I'll hope for you.
Many hugs,