First of all, congratulations on making the choice to recover. EDs are tough demons to fight, so I wish you the best of luck in your recovery journey.
Second, a person's caloric intake depends largely on their size. Bigger people need more calories to maintain their body. That's why body builders eat so much, and why large, obese people can still get away with eating 2000 calories and losing weight. So there's no magic caloric number, it depends on your body and body composition.
I'm 5'4" and currently weigh about 125-130lbs. My BMR (aka, how many calories I would burn just laying in bed all day) generally comes out to about 1400/day (there are a variety of equations used to compute this, so it just depends on which on you use). However, you have to remember you burn calories moving around, grocery shopping, showering, etc, so in reality I burn more than 1400 calories every day. I'm also pretty active, so I tend to eat more on days I go running or workout. My daily calorie intake ranges anywhere from 1300-1800 a day on average. Days I'm super active or am treating myself, I'm sure I get up to 2000, maybe above.
1500 is probably a very healthy amount for you to be eating, unless you're very tall or have a lot of muscle. You may look into intuitive eating. I've known some women recovering from eating disorders who have had great luck with it after reading the book by the same title. I've actually stopped calorie counting myself and am just focusing on eating when I'm hungry and eating healthy foods, to reduce the weird food hangups I was developing. It seems like it's really helped a lot of people work through their issues with food though, might be a good read.