Can't lose. Urgent help please

You're damaging your metabolism. When you severely limit calories, your metabolism adapts over time by slowing down, and when you binge, you take in a large amount of calories, but then when you go back to severe calorie restriction immediately, your metabolism keeps slowing. You're not doing yourself any favors...

I'm aware my metabolism is damaged as a result of all the starving, but what's worrying me is that if I increase my calorie intake, I'll gain more instead of lose since my metabolic rate is already low.

So write down lessons learned and mistakes made - look at that to not do it again.

For instance, prior diet was hopefully correct for that weight then, but now it wasn't. So you merely needed to do what you did then, and cut calories a little bit more.

So now eat at maintenance for a while - that's how you recover. And slowly back off the exercise to sustainable level, what you enjoy and can do long term.

If the current amount you eat is maintaining your weight - guess where maintenance is?
Kind of scary huh, because to keep losing with screwed up body would mean eating even less with current level of activity.
Meaning your future maintenance is likely current level of eating and activity - is that sustainable to keep the weight off?
Doesn't sound like it with the binges.
So don't even think about trying to repair and lose at the same time - unless you enjoy stress and no progress.
Just accept the fact of what you did, and fix it right.

So increase calories every 2 weeks by 100 extra daily, from whatever you eat in total now.
Know in your brain that even if your metabolism did not increase to what you are eating, it would take 35 days of eating 100 over maintenance to gain 1 lb of fat.
Reread that. Because your metabolism will increase.

You will gain fast water weight - same water weight you lost fast when you went in to diet. It was coming back no matter what, so don't sweat it.
But since it's in the muscles - you shouldn't visibly see it.

Set MFP to honest non-exercise activity level, weight loss goal to maintain.

Start working your way up to that level.
When you are eating at your maintenance level for 2 weeks, then start logging exercise.
Log your exercise as 90% of whatever was shown, and eat those calories back too. But only 100 extra calories at first for 1st week. Then 2nd week 200 cal back. Ect until you are eating the complete 90% of the burn back.
Now you are eating at non-exercise and exercise maintenance, or TDEE.

Then you can take 1 lb per week weight loss goal, which would be reasonable for 10-20 lbs to lose.
When you get to 10 lbs left, you switch to 1/2 lb weekly.

I'm aware my metabolism is damaged as a result of all the starving, but what's worrying me is that if I increase my calorie intake, I'll gain more instead of lose since my metabolic rate is already low.

So write down lessons learned and mistakes made - look at that to not do it again.

For instance, prior diet was hopefully correct for that weight then, but now it wasn't. So you merely needed to do what you did then, and cut calories a little bit more.

So now eat at maintenance for a while - that's how you recover. And slowly back off the exercise to sustainable level, what you enjoy and can do long term.

If the current amount you eat is maintaining your weight - guess where maintenance is?
Kind of scary huh, because to keep losing with screwed up body would mean eating even less with current level of activity.
Meaning your future maintenance is likely current level of eating and activity - is that sustainable to keep the weight off?
Doesn't sound like it with the binges.
So don't even think about trying to repair and lose at the same time - unless you enjoy stress and no progress.
Just accept the fact of what you did, and fix it right.

So increase calories every 2 weeks by 100 extra daily, from whatever you eat in total now.
Know in your brain that even if your metabolism did not increase to what you are eating, it would take 35 days of eating 100 over maintenance to gain 1 lb of fat.
Reread that. Because your metabolism will increase.

You will gain fast water weight - same water weight you lost fast when you went in to diet. It was coming back no matter what, so don't sweat it.
But since it's in the muscles - you shouldn't visibly see it.

Set MFP to honest non-exercise activity level, weight loss goal to maintain.

Start working your way up to that level.
When you are eating at your maintenance level for 2 weeks, then start logging exercise.
Log your exercise as 90% of whatever was shown, and eat those calories back too. But only 100 extra calories at first for 1st week. Then 2nd week 200 cal back. Ect until you are eating the complete 90% of the burn back.
Now you are eating at non-exercise and exercise maintenance, or TDEE.

Then you can take 1 lb per week weight loss goal, which would be reasonable for 10-20 lbs to lose.
When you get to 10 lbs left, you switch to 1/2 lb weekly.

Wow, what a terrific response. There are some really great people here. Listen to this guy. Don't do what I did and do this for over 25 years. It really can mess you up both emotionally and physically.