What should i do?

What should i do with my life? I am reaching the end of my rope. My life is always, one thing after another, when i get asked,"how do you diet, you're always so thin" My response is  as follows,"Everytime my body wants to weigh 100 lbs i get sick in some way or another, scoliosis, lack of vision, and colitis." haha I mean its what god has handed me. I suppose most of my frustration lays with my undiagnosed eye condition which allows me to not be independent i can't drive, i can't even go shopping alone. i depend on so many people just to get me to manditory events like doctor visist and work. thats all they'll give me and the entire time my family complains about it like its my fault, i cant see. I feel worthless i just want to see and i dont understand why i can't find a doctor who really wants to find an answer. im suppose to finish school. i can't read the books i can't ever regnize people i see everyday because they're face is ablurred out. Its just frustraiting and honestly i feel alone in this fight i really do.