Elpheba is right - you need a minimum of 1500 - and that is probably too low.
Can you do that? If the answer is 'no' then I am sorry, your eating disorder is back.
Your brain is not getting enough nutrients so you can't rely on your own perceptions - just like if you were drunk. Scientific tests have shown how alcohol impairs people's ability to judge their own abilities, and I suspect that being starved, as your brain is now, will be having a similar result - so you need An impartial, professional opinion on whether your eating disorder is back.
An experiment at Minnesota university in 1950 into the effects of starvation found the following:-
"Prolonged semi-starvation produced significant increases in depression, hysteria and hypochondriasis (a focus on somatic concerns) as measured by the MMPI (a test of personality)
Most participants experienced periods of severe emotional distress and depression and grew increasingly irritable
Some individuals engaged in self-mutilation (these days we call this self-harm, often seen in people struggling with regulating their emotions) – apparently one person cut off three fingers with an axe although it was unsure if this was deliberate or accidental
^Many appeared apathetic and lethargic with a diminished sexual interest
Volunteers showed signs of social withdrawal and isolation^
Participants reported a decline in concentration, comprehension and judgment capabilities"
My own cousin ate a very, very restricted diet - she was a fruitarian (ate only fruit and some nuts), and the balance of her mind was damaged by this, and she committed suicide.