Needing a bit of a kick up the bum/scientific talking to

M0t1v4t10n4l

Between the ages of 11 and 14 I was referred to by doctors as anorexic, I personally don't like saying I was because I still think I was just thin but in all honesty I can't remember what I was like back then, I don't remember my exact mindset but I can remember counselling and doctors appointments and such, at 15 I was "recovered" and left to my own devices

By February this year I was a little too close to overweight for my liking, I had too many wobbly bits and I just wanted to be more "trim", These weren't delusions I was a size 12 which I don't consider fat by any means but i'm only 5ft4, I just wanted to be healthier and slimmer. Since February this year I've lost between 11lbs and a stone (the scales are switching daily!) all healthily just good food and exercise and I'm pretty proud of that.

Recently though I've notice some of my old mentality coming back...I've just been for a run, I aimed for 5 miles but I've hurt my knee so I stopped at 3 so as not to cause more damage, but for a mile before I stopped I was having an internal debate - the smart part of me saying "you've hurt yourself, you're going to hurt yourself more, stop now" and another part of me going "don't stop, stopping isn't how you lose weight" I'm glad I stopped eventually but I'm also ashamed that I spent a mile risking further damage for the sake of what wouldn't have even been noticeable weight loss.

The next issue is that as soon as I stopped I thought "well now you're going to have to eat less" again the smart part of me said "don't be ridiculous, eat properly and healthy" and yet I still haven't eaten since I've been back even though all I've had today is a salad.
It's happened a few times over the past month or so, I'll forget to eat and I'll be happy about it, I'll try to go the rest of the day but usually I mentally slap myself and tell myself to stop being an idiot.
Back when I was "recovering" I'd just eat crap and that'd put me at my daily calorie goal but now I'm counting macros as well as calories and I don't want to just eat enough I want to eat enough of the right things.
Any advice? I.e - "this is why starving wont help" "these are all the cons of not eating enough" etc I'd really rather not slip back into how I was...quite frankly I need the energy for my upcoming exams!