well i'm 16 years old,im a female i weight 51 kgs and my height is 165-170cms. there is diabetes and cancer in my family. for a while now when i eat sometimes i feel like i am about to be sick, i have to use the toilet a lot, i find my nails break or chip easily, if i don't eat i find that sometimes i'll get the cold sweats an i feel faint. about the middle of last year i was 54-56kgs but now weigh jus over 50kgs. could anything be wrong with me?