Subcutaneous Granuloma Annulare

I have been diagnosed with Subcutaneous Granuloma Annulare. One of my nodules in my leg was surgically removed for biopsy about 2 months ago. It has grown back twice its size and I now have two nodules in that area instead of the one that was removed. I just want to know if this is common.

Also, the original pathology report showed that my nodule was most likely a rheumatoid nodule due to the colloidal iron staining being negative for dermal mucin.  I was originally diagnosed with rheumatoid arthritis, but went for a second and third opininon and was subsequently diagnosed with fibrmyalgia and then referred to a Dermatologist for the nodules. With this pathology, could these nodules be something other than granuloma annulare?