Talk to General Physician on Diziness, Lack Of Focus, Sleep Deprivation

اسلام عليكم ورحمة الله وبركاته Its been almost 3 years I am facing the issue of diziness but I did not paid much attention to it as I thiught it will go away with time but now its irritating me a lot in my daily life. I was told maybe its because either I am sleeping too much or too less. I tried sleeping for 10, 8, 5 and even 3 hours of sleeping but the results are same. I was also told that maybe its my diet problem. I was suggested that I should post my problem here on Marham to see what doctors think. Furthermore, it sometimes happens that my brain do not process any information that I read. Its like I am totally dumb at that moment. I am hoping to get convincing replies from the experts.