Question? Should i be concerned

I’m a female 5’3 20 yrs old and weigh 84 pounds been using for 6 months now, this past month I been feeling weak and I’m very pale and dizzy a lot and feel nauseated at times of the day. my bones are so fragile loosing a lot of my hair now. I eat once a day or sometimes just a few bites of something and drink a few sips of tea or water I know I’ve gotten bad at drinking fluids now I’d rather eat then drink fluids. My body aches so bad can barely do anything even to much to do dishes