I am 16 years old, 5.5 and weigh 115 pounds.. I have had issues with my side, my skin, and my ears my entire?

My skin has a rash on it that is red small bumps. It is extremely itchy. It is on m, arms, face, and inner thighs. I also have dry scalp with lots of flakes. When I was born 3 weeks early, it was said that my hips were underdeveloped. Whenever I walk to long, or run I get a sharp pain in my sides. My eyes have had 4 surgeries to correct lazy eye. I have astigmatism, as well as a condition where my cornea is coming to a point. Now for the biggest and most annoying issue. I have had multiple ear infections in both ears, as well as have had tubes surgically placed into both ears and taken out, (HA HA). Since that, and currently I have had serious ear infections. I am also now light and sound sensitive. I have also been getting headaches on the back of my head. Let me ure you that I have been to doctors various times to no relief. The one I went to yesterday told my mom, right in front of me that I was making it all up. I need tips, websites, and advice.