Loss of Period/Weight gain?

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Help! Okay so, I am in recovery for an eating disorder. My weight kept getting lower and lower until I was put inpatient for anorexia. Now nearly a year later, and my weight keeps going up and up and it's getting out of control. I also haven't gotten my period in 3 years so today, actually..I'm going to the gyno.
But I'm freaking out because I just decided to weigh myself and it's scary! Not happy! Does anyone think there could be a link between the loss of period and weight gain?

I've been eating pretty healthily now, I had a momentary problem with b/p but since I've been trying to be pretty balanced. And I exercise usually every other day. I eat pretty clean..I just don't understand..

Any words are appreciated thank you!