Eating disorder?

I'm a skinny 13 year old and i haven't been eating well. I used to weigh around 108 or 110 pounds, my normal weigh for my size. I went with my brother to go to a camp and my eating patterns got thrown off.  i'm not sure if that's the cause or it's just the heat but I haven't been eating normally. i tried to ask my mom but i'm scared, thinking she might scold me for not being responsible of myself. Last time i checked my weigh, i weighed 97 pounds. i drink tons of water but my pattern is still not the same. Before this started happening, i would eat normally. Do i have an eating disorder or is it just me?