Think I Might Have a Eating Disorder,can Anyone Help?

idk really anymore. . . i mean i just usually pass it aside whenever one of my family members complains they never see me eating, or that i'm too skinny, or that i need to eat more, i just shook my head and put it aside whenever someone told me i needed more calcium and that i'm not healthy. I'd get the roster number at school saying my weight for my size and age is considered average, and use that as a good excuse, but now i'm really starting to think about it. . . i mean. . i was tiny always as a kid, hell i weighed very very little until about 8th grade or so, right now i'm in 11th grade, 5'3 and even though i made a improvement of weight since then,. i'm still really incredibly skinny ((trying nto to say any weight bc it said nto to in the forum guide thingy. . anyways)) last time i got really sick, did;t eat for a few days ((did;t bother me though)) until i weighed myself and i was 10pounds below what i was b4. . . i dont eat breakfast, i dont eat lunch and if i do by some odd chance it's only something small like a granola bar, i do eat dinner, sometimes, I've been eating dinner, or half of my dinner more frequently, idk why, whenever i eat dinner i just get sick, or feel sick, i start feeling nauseous or not hungry and dont have the desire to eat, even if i haven;'t eaten all day. I'm never hungry, if i'm hungry it's once in a blue moon, as i said, i only have one real meal a day, sometimes, sometimes it's just a small snack a day like rice. I think my parents have noticed, they just wont say anything bc they know i get annoyed. But idk. . i guess i mean, i could weigh a bit more. . but i'm NEVER hungry, ever, the only time i can even remember being hungry for something, was when i was sick for a week and did;t eat anything. . boy that was fun. . . . i dont get colds a lot, but when i get sick, it's usually something with my stomach and i'm almost always hospitalised, i end up loosing up to 10 pounds, usually 5 though, and getting really really weak. Without being sick i'm always always tired, even if i get sleep by an odd chance, i'm still exhausted, i was beginning to wonder if maybe it's bc i only eat once a day or so, idk what to do, idk if i have a real problem here, or maybe it's just me getting all paranoid bc my family wont shut up about it, i mean it never bothered me b4, I've been eating only one meal for about 3 yrs now, and b4 that, even when i was in elementary school, i would only eat 2, sometimes, idk what it is with me. i did;t think i had any sort of eating disorder, i'm just never hungry, when i'm depressed it gets worse, I'll maybe, have one snack a day, or pick at my food and then say i'm sick a an excuse, i just never feel like eating, and i have tried like to force myself to eat, bc I'd b shaky and almost fainting, but still not hungry, but whenever i try to force myself to eat it just makes me feel sick and makes me feel like someones shoving food down my throat suffocating me with it, idk what to do really. . . . if anyone could help? or at least tell me if there could b something wrong with me lol, that would b a bit helpful, please and thank you =/