Is it stress or more?

I was in an extremely stressful situation and I quit eating as much, not sure why just lost my appetite, things got worse, and I threw up every time I ate, then I left and I was able to eat again. But I don't eat nearly as much and I live in the desert area, so its getting really warm which makes me want to eat less, so I may eat once or twice a day which messes me up, because I'm hypoglycemic. But before that, I was an emotional eater, and I would eat and feel guilty, and if I eat more than a few times a day even now I feel guilty like I am eating too much, I have had weight issues I'm not fat, but my sisters were anorexicly skinny while I had a womanly figure, so it has affected me, and I was accused of having an eating disorder last night, is it stress or is it a disorder?