awful day

I starved myself for three days and made up for it by eating nearly 2000 cals today. I know that doesn’t seem like much but it’s a lot when my average intake is 500 cals at most. I hate how I feel full and disgusting but i’m so sick and tired of having no energy because of a lack of food. It’s gotten to the point that it’s affecting my performance in school, in sports, and it’s putting a strain on my relationships. I dont know what to do atp.