Possible Telogen Effluvium from Eating Disorder? (Photos)

It's hard to say. I'd need to see your scalp up close to get a sense of whether there is miniaturization of follicles, evidence of regrowth and review all your history to say.  Certainly it does sound like you've had a TE before but whether or not a TE is occurring again or whether previous TE cycles have uncovered some underlying predisposition to androgenetic alopecia is really the key question for your dermatologist to sort out for you. 

Yes, eating disorders can cause hair loss.  Hair growth requires nutrician from proteins and vitamins. If someone is deficient in their caloric intake, then this can cause hair loss. This is most likely reversible with resuming a healthy, balanced diet. 

This is a complex problem and many times there are causes that can be addressed. I have written extensively on this see below