I Am Not Sure What Is Wrong With Me, But

I am not sure what is wrong with me, but I get headaches everyday and about 1-2 a day. My vision is blurred at times, I have trouble remembering even the little things, I have lightheadedness and dizziness everyday and it occurs when I am lying down in bed(turning over or just lying there), at work if I stooped down and stand up, I get dizzy and light headed. I also sometimes can talk very well as I forget what to say, or it comes out garbled. I also very rarely get ringing in my left ear that comes and goes. Can you tell me what this might be so I have a clue what my doctor can look for? Thank you