5'3" and can't lose weight!!! PLEASE help

Hi all,

(ED TW)

I am a 19 year old woman who is 5'3" and around 120-125lbs and have been trying desperately to lose down to 105-110lbs for the past few months and haven't lost ANYTHING. I exercise a lot (I'll either go for a 2 mile walk one day, or I use the elliptical at the gym for an hour at 4-5mph, which burns about 430 cals. average per workout), I eat very healthily (I've been a vegetarian for years, breakfast usually consists of fruits + cereal/oatmeal, lunch usually is a small salad or fruit and cottage cheese, dinner is usually a salad or quinoa + veggies, unless I go out with friends, but I never eat fried foods or unhealthy foods) but still, nothing seems to work. I have a history of an eating disorder from when I was a teenager; my lowest weight was about 82lbs when I was 16, same height (possibly a half an inch shorter back then but still). I'm wondering now if my eating disorder truly devastated my metabolism? After treatment my first time, I immediately lost weight down to 90-98lbs (fluctuating between those weights for about a year) but I maintained on pretty much the same about of food I eat now. I might eat a bit more now, but not so much to make the 30-40lb difference that it is!! I understand that my weight now is NOT high. I am just feeling very disheartened that my body is so stubborn and I can't seem to shed even 5-10lbs just to fit into my old clothes better. I have never weighed this much in my life! I know I'm not an adult woman, and my pre-ED clothes (when I was 14-15 I was 105-110lbs) shouldn't fit me necessarily, but it's still very difficult for me emotionally to be a higher weight now. I'm honestly considering going back to my old habits to lose this weight, or try a supplement of some sort (I've heard Green Coffee Bean Extract can be effective?). I do see a nutritionist but ALL she tells me is to eat MORE than I do now, and eat more protein which I don't buy! Because I've been TRYING that and DOING that but all it does is make me gain more which depresses me. I've even gained more weight this summer, I was 117 back in May/June and now it's creeped up again. I honestly have no idea what I'm doing wrong, or what I can do. I am honestly so upset by this all and could really use some ideas, support, motivation, stories, anything, from anyone. Is there anything I can try? I just want to be like everyone else and be able to lose a few pounds! Thank you ahead of time for reading all this complaining, I'm just really upset, and this occupies my every thought. It's honestly WORSE than having the ED because I have the same mind, the same "counting calories" and thinking about food thought process, but a body that's not underweight to match that. Please help!