3 months post op & I'm getting sharp stabbing pain. I cant take anti-inflamitories & I think I have nerve pain. Is this normal?

Rheumatoid arthritis itself is not a contraindication to a breast reduction but many of the medications that you may be taking may be more problematic.  Some medications cause increased bleeding.  Check with your rheumatologist prior to considering the surgery.  

No one can give you a specific risk for loss of the areola. Breast measurements factor in as do other medical conditions such as diabetes. Patients who smoke Have greater risk. Previous pregnancies make a difference as well.

And having a reduction doesn't prevent you from having fluctuations in your breast size post-op.  And if you ever experience marked growth of the breast size, you should see your doctor.