After you were diagnosed, did it bring back a lot of old memories, or give the old memories new meaning?? This has been happening to me like crazy. Memories come up, and I think, "There it was. There it was ..."
Just today I remembered how I became a vegetarian with my best friend in the seventh grade. Kind of a popular thing then, but it became an obsession for me! I'd known what meat was for a long time, and never much liked it, but once I was no longer partaking of it, I let my horror of it flourish!! Whenever I saw meat, I would think graphically of where it came from, what it was and how utterly bestial it was of us to enjoy it like it was no biggie. I wouldn't let my food come anywhere near meat, in the fridge or during preparation. I would cringe in horror if my mom put her hand near the meat and didn't thoroughly wash them before touching something else. And I couldn't understand how my friend could abide to have her veggie burger cooked on the same grill as real hamburgers!! The horror started to get bigger and bigger and was really becoming prohibitive and painful. I realized life was going to be really tough if I kept this up, so in my junior year of high school, my mom and I did exposure response without realizing it

I spent agonizing sessions before a plate of chicken enchiladas, looking but unable to eat, and finally took a bite of an old favorite - a mcdonalds chicken mcnugget. It was really slow, but I can say that obsession is passed, though I still don't eat much meat, and it still gives me the ick sometimes.
It's kind of encouraging to see that not all obsessions are forever