I ve been in various  degrees  of pain these  past seven months and my doctor ( private via insurance) attributed  it to a prolapsed disc causing back pain and right leg sciatica. Hes recommended me to  have a steroid injection. My back pain has now settled.
Aside from this ..the pain and swelling in my left knee has persisted and following a blood test, my GP says i have RA and referred  me to a constant rheumatologist. 
Do you think I should go ahead with the epidural  injection? Or wait to see what the rheumatologist says?