I've never taken any vows, I've never been vegetarian because I was a Buddhist - more a case of being Buddhist because it was in accord with my existing ethics.
I've wanted to be vegetarian since I was 8, for ethical reasons, but didn't get to do that until I was 18. I can understand my fellow Buddhists' skepticism about my efforts to avoid eating animals, if they've never personally experienced a craving so strong that they can't think about anything else for days on end. It's hard to empathise; I've never, ever experienced a desire as strong as this in my whole life. It's a shock, and I understand much better now what drug addicts are dealing with. As for 'medical condition', most people consider my transition to be elective, so I've had people say to me "If HRT is doing that to you, stop taking it." Again, if you haven't experienced gender dysphoria, you can't imagine it. It's something else I fended off for years, to the detriment of my health.
At the moment, I just have to eat what my body demands at the time, otherwise I don't eat much at all, which would be no good. I'm hoping this will fade back the way the fish did, to the point where I just want it every few days. At the moment, it's almost every meal. I'm making a really good soup just now (sweet potato, spinach, lentil) and I know that when I eat it, I'm mostly going to want to add salami. So it is.