I don't think I've got/had annorexia because I've never felt overweight, however, I can be bad at starving myself.
From the age of 13, I starved myself for 3 years, would go 3 or 4 days at a time without eating and when I did, I would make myself vomit. I collapsed all the time and at 16, I weighed approx. 70 lbs. I'm actually surprised I survived those years!
I don't vomit anymore, but when I start feeling down, I starve myself. It's like I don't get hungry, so I forget to eat, but now I recognize it and force something down my throat when it gets to 8pm and I realise I haven't eaten anything.
I think its a control thing, but when that cycle starts, I lose control of my appetite, if that makes sense?
My usual weight when I'm eating fine is about 115/120 lbs, but I've dipped down below 100 many times.