I dunno about strong. I think I just had a choice to make though that sounds very simplistic.
I know what you mean about arguing with Drs. They don't have a clue - usually.
I found that the worst support possible was people trying to get me to eat. The thing is, it's nothing to do with eating - not in the way they see it. All they see is, dangerously thin person who needs to eat.
But all you want is someone to engage with you as a person and look past the eating because that is the way in. It's a bit like looking glass land to most people who have never had it.
I wasn't classically anorexic either. I think it's called secondary - where the cause isn't thinking you're thin. I had to diagnose that myself - I knew I was thin. I was scared but I was afraid to eat, because I felt too full all the time and was afraid of making myself sick by mistake.
I needed to know what to eat, and how much, and what was safe if you like - but no one knew or cared about that, no one had those answers. I had to find my way there myself including accepting I might get it wrong sometimes.
I think it began when I was a child, as part of a generalised anxiety. Not as young as you but still.
Then I overate when I was a teenager, and got so afraid I couldn't stop, that I went the other way. I still wonder if it will come back in some way - but I am very odd about eating even now.
Don't know if any of this is remotely interesting but anyway - if anything helps then that's good. You sound v intelligent and though I know you can't get out of this fix right now, you have got a good chance of doing so when you get to the point where you can trust something, yourself maybe, I don't know - or maybe not trust, but feel like it doesn't matter so much if things do go a bit wrong sometimes.
Meanwhile try not to freak out and do what YOU need not what other people tell you to do.
It took me ages to get there, but it can be done. 