Previous ED, need help&advice!

Hi! I don't know where else to turn and thought maybe someone could maybe help me here.
I know I need to find a proper doctor to discuss this with as well, but I am currently searching for a new one after having gone to two that were rude/unhelpful.

Anyway, before I go into my questions, here is a little backstory to understand my predicament.
Apparently my grandma liked fat kids so she fed me a lot when I was younger, and by the time I was in grade 8 (USA) I had reached 300lbs. (Side note: i'm not short, but my body frame is really tiny apparently)

That was the sudden realization that I was disgusting and actually had to do something. I started to skip breakfast, then lunch, then by the time I was about to graduate high school, I was skipping a day or two of eating entirely. Eventually I plateaued at a weight (probably for a few days and it was too much to handle, I honestly don't remember anymore), but I started to eat again - which is something I hated the idea of doing, so consequently I started to purge. (I have not been diagnosed with an eating disorder, but at this point I had started throwing up every day, multiple times a day).

About a year later I had reached around 100lbs (give or take a few pounds, with some excess skin, but it actually wasn't TOO bad compared to how much i've seen others have), and I stayed around that weight for 3 or so years. (At this time I didn't binge/purge/restrict too much, or do anything of that sense). I probably ate around 1500-2000kal a day, and ran some mornings.) Unfortunately because of stressful events happening one after another, I had gone back to binging and purging, but the purging didn't come fast enough because I ended up falling asleep then waking up to purge the next morning.

Fast forward to 3ish years later and I'm at 220lbs or so (it fluctuates between 215-223 pretty easily). I've been trying to stop purging on and off through this current year, and I have been fine for the past few months now. I have not binged (in my mind it was 'binging' but not actual binging) or purged at all.

This is where my questions come in. Has anyone else had an eating disorder, diagnosed or not, and had trouble losing the weight again? I try to stay at around 1200kal, sometimes below 1000, but definitely below 2000. I eat a mostly vegetarian diet, and am trying to move towards a plant based vegan diet. I work out 2-4 hours a day (cardio(?), walking on treadmill and light weights), and I drink a lot of water and tea. (I hate sweet drinks, and sweets in general). I haven't budged much on the scale, and I'm wondering if anyone else has had this trouble, or may be in the same boat as me.

I've been told by my chiropractor that I should check my cortisol (?) levels, since he could tell with my tense back that I wasn't sleeping well (which i've had a problem with for a long time). Other than that, I have no health issues, other than a slightly elevated blood pressure.

Again, I know I should talk to a professional about this, but I am still searching for one that is helpful - unfortunately the two I had already been to weren't I just want to know if anyone has any input, any advice, any stories or experiences that may be similar.

Sorry for the tl;dr, but thank you for reading!

Edit: Thank you for the advice about seeking medical help -I know- that though, and that's not really what I want help on. I'm looking for a doctor that will actually care rather than saying 'you're fat. do this. no, you're not actually doing that' (which is literally what happened). What I want to know is if others have had the same experience as me for those in the same boat (if there are any of you).