Period loss in recovery

[Sunshine561]

Hello,

I am currently in anorexia recovery. I take a contraceptive pill, and when I was loosing weight fast, I still had irregular menstruations, even if I was eating the third of what I eat now.

The problem is, I did not get my period this week, and I was supposed to get it. I was wondering if someone knows what may have caused that loss of period, even if I am actually gaining weight.