Eye problems and constant fear.?

For the last few months i have not been able to drive a car it fees like my brain isnt picking up on things as fast as they are coming at me. My vision feels off really bad. Also I constantly have fear for some reason. For instance if i see a shadow in my field of veiw and can't figure out what it is i freak out bit, or if there is a smell that is stuck in my nose i freak out. It is so much worse when i am driving it is like my mind is gonna stop working almost anyone have any hints for me or experienced this. I have been to multiple doctors and i have no relief. I am on xanax 1 mg 3 x daily and lexapro 10 mg which i just started.