Websites for anorexics?

i feel i may be anorexic. im 17, weigh 110lbs and im 5'5".. the thought of gaining weight really really scares me even though i know i should gain a few pounds. i've been sick lately and now im always coughing, i have really bad headaches and im gettin dizzy somedays and seeing things. then im also depressed with the stress of school, insomnia and my perfectionism. my aunt, uncle, and grandma have asked if i was anorexic and said i should gain a few pounds but i really dont feel okay with that. are there any private websites for teen girls who think they may be anorexic?? i looked at signs of eating disorders and i MAY be anorexic but i dont wanna make a big deal until im sure.