I got it when I was 10 (ie at the end of my 5 year old shot). Took them forever to diagnose even then back in the mid-1960's.
Was crook as a chook for 6 weeks. My mother invented all sorts of projects for me; the best of which was a leaf collection. She would bring back a leaf from shopping, etc and I would look it up in a book and write about the plant.
Glad you're on-the-mend.