What Causes Crossed Eyes When Having Dizziness And Headache?

Hi, I have been having a symptoms of having crossed eyed whenever I feel dizzy and I have this for almost 13 yrs now. For some reason, when I feel tired or just dizzy in particular, my eyeball on the left side goes in the middle end while my right eyeball just stays in the middle of my eye. I don t know what it triggers my eyes to have crossed eye but when I do have crossed eye, my head hurts or the one connected to my eyes inside of my head hurts. They said it s because of my vertigo and migraine but most people have that and not have crossed eyed. I m the only one who is different from them, if I get vertigo, I automatically get crossed eyed and sometimes it happens anytime and anywhere and that scares me. The doctors can t explain who I do get crossed eyed when I get dizzy. Please help me!!! I have been suffering this symptoms since I was 5th grade and now I just graduated from high school. All I want is to live a normal life and not wanting to get dizzy and have crossed eyed anywhere and anytime. Please help me