According to the Spondylitis Association of America (ReA is one of the Spondylotharapies), ReA usually clears in 3-12 months but, if you are HLA-B27 positive it can be more severe and last longer. I would not
encourage you to avoid treatment. If you are dead-set against taking
enbrel, talk to your doctor about alternatives.
3. Will it get worse, better, or stay as it is while I'm waiting for the symptoms to go away?
Unfortunately, there is no way to know.