Rheumatoid Arthritis Support Group
Rheumatoid arthritis is a chronic, inflammatory, multisystem, autoimmune disorder. It is a disabling and painful condition which can lead to substantial loss of mobility due to pain and joint destruction. The disease is also systemic in that it often also affects many extra-articular tissues throughout the body including the skin, blood vessels, heart, lungs, and...

The steroid improvement on day 1 is a good sign that it's autoimmune of some sort.
Breastfeeding and most of these meds don't go together. You wouldn't want to pass any of the med onto your little one. Tough decision though!
I'm sure you'll make the right choice for you and your family!! Stay strong and welcome to our little forum family. This forum has been a GREAT source of support for me.
My heart goes out to you, I know what the onset was like for me, having a very little one to care for. I nursed him, but the longer I was back at work, the more he preferred a bottle. He sort of weaned himself around 7 months. I'm sorry your decision to wean has to be affected by needing to take RA meds. I'm sure it's not easy for you.
This is a great group. Keep us posted, and feel free to vent or ask questions. Lots of strong shoulders and good advice around here.