Can't eat certain foods without getting sick?

[Alewaldr2]

Since December I haven't had much of an appetite. I will eat meals and a couple snacks here and there, but I get full really fast. I have lost about ten pounds and I haven't been trying to lose weight, cause I am already skinny enough as it is. One time I got really sick one day almost anything I ate made me throw up. After I went threw a breakup with my boyfriend I didn't eat for a few days, but my eating habits are the same as the were before and I keep losing weight. It seems like dairy and gluten upset my stomach. I went to the doctor and got tested for a gluten allergy and it came back negative. I also bruise easily and get tired a lot, my friends thinks I an anemic like her mom, since she has the same symptoms. Like I said I am trying not to lose weight. I don't know what's wrong, it's scaring me.

[whattothink]

Go get tested for diabetes, blood sugar, and insulin. And yes skinny people can get diabetes. The only reason it happens is your blood sugar gets crazy for a while whether it be eating too much often, gaining weight rapidly, or not eating can cause it. One of my friends 90 lb 5ft 20 year old daughter does and her drs told her its because she never eats and all she drinks is kool aid or she she eats candy. Hope all comes back well though.