What Could Popping Of Ears, Headaches And Vision Narrowing Indicate?

I am 34 years old and have had numerous double ear infections. I had my tonsils and adenoids removed when I was 9 or 10 due to many throat infections but I never had tubes in my ears. A few years ago I was laying in bed and took a drink of soda and I felt it fizz in my right ear. I went to the doctor and was put on antibiotics but I feel like I have fluid in my ears all the time and its getting worse. Every time I swallow my ears pop and there is pressure all over my head. I get headaches a lot. I constantly feel like there is fluid running down my throat and I feel air bubbles moving around in my head. I feel lightheaded and my vision narrows and goes black and I feel like I am going to black out. I went to the doctor in april and was given antibiotics but they didnt help so my mom gave me a z pack and it felt better for a few days and then returned. I am at a loss here. I am tired of this feeling and my ears popping all the time. Every doctor I go to thinks im crazy and looks at my ears for a second and says I have sinusitis and double ear infections and prescribe amoxicillin and sends me out the door. Im going crazy. Please help