Also, there is 3500 calories in a pound, not 2000. If you want to lose weight, I suggest that the first thing you do is make sure that you're doing this for yourself, to make you feel better emotionally and physically. It's easy to get caught up in any failures and start feeling guilty and losing your self-confidence just because you're asking yourself to do things that aren't just difficult and hard on your body, but might also be impossible. That's just setting yourself up for failure.
Now, I know you and everyone else want to lose weight as fast as possible, but that has lead me to years and years and dealing with some horrible eating disorders and I ended up gaining a lot more weight in the end. Even now I still have problems with my old habits (wanting to lose weight fast and starving myself even though I know that it has never worked before and will never work and just ends painfully.
The best thing you can do for yourself is take it slowly. Rome wasn't built in a day, and you didn't gain all that weight in one either. If you follow a healthy diet and change your life to be a bit more active (you don't have to exercise- but it does make you feel good just to walk a bit more) you should see results fairly soon. In fact, probably faster then it took to gain the weight if you stick with it. You'll feel better, you'll have a better prospective on life, and you won't have any ED!
So just keep that in mind the next time you want to try and starve yourself. I would recommend to see what amount of calories would be good for you, although I would also suggest to not worry to much about calories and instead try to listen to your body .
