My Weight Rollercoaster

A'ight so... l'm a 126 lbs 5'4" woman

When I turned a teenager I spiraled into a difficult time period which included being very underweight (103 to about 95). A few years later, my weight plummeted and I was prescribed a medication which made me gain back a normal weight... And THEN some. So I've been struggling to go from 167 lbs to 115. Yeesh.

I have all my life battled a low appetite. At school I hardly ever ate lunch. I would come home and binge on high-sugar foods (not because I felt hungry but because I was stressed). The older I got the harder it was to eat and by the time I was 16 I was barely touching food and was fasting. Suffering from a debilitating mental illness for years hasn't helped this habit of near-starvation and poor diet.

Back then I exercised not so much but now I exercise 6 days a week for at least an hour. My problem was so eager to lose weight I put myself on a strict diet of under 800 calories and lost about 5 lbs overnight. Yesterday my stomach felt clinched and I was having palpitations so I actually ate a normal meal last night. God, I don't know how to eat at ALL and I need some help. So what kind of food/meal schedule/behavioral changes do you recommend for someone trying to lose 11 pounds who also has a habit of not eating nearly enough and cringes at the thought of eating 2000 calories?