Did you read my post about accidentally drinking bleach?
HLA-B27 neg; Mis-diagnosed with fibromyalgia in mid-20s.
Vague AS symptoms in 20s and early 30s (no diagnosis).
During age 47 (2015) from NSAID use developed complete axial inflammation (started from from skull and progressed down to sacrum). Included psoriasis. Trigger in scull was reverse blockage in a SCUBA mishap in 2013. Straw that broke the camels back was over use of NSAIDs. NSD works well but not perfect. Strong involvement between symptoms and gut integrity.