Are My Eyes Screwed????? List Of Symptoms Below. I Have -800 In Both Eyes And Astigmatism?

Whenever I wake up, my vision blurs and a black cloud comes over. I feel pressure. This lasts 5-15 seconds. Whenever I watch TV, go on the computer, play video games for over 1 hour, i get a really bad headache, I feel really uncomfortably hot, and dizzy. I also see little floaters. I’m 14. Am I going blind?