it sounds like hallucinations, but maybe they're just stress induced? or eye-strain induced at work? Anxiety? Sometimes when I am feeling "jumpy" i start thinking i'm seeing things etc.

I can relate to sensory overload however and unfortunately all i've come up with is learning to tune things out. Sometimes my brain misfires and i don't tune things out and then its total sensory overload. Mishearing? - i learned to read lips. doesn't help on the phone though.