supposed to be a purist?

I am 45. Have been leading a healthy, purist lifestyle for over 20 yrs. I have been vegetarian for 25 yrs. No meat or dairy.
Eat organic food, no alcohol. I am petite woman size 2.
How comes I have gout? It makes no sense? I am on day 4 of my first attack. Drinking apple cider vinegar water, eating cherries etc. it's worse at night and in the morning. I am at a loss of what to do next?
Anyone got any answers?
Thank you,