I am stressed and angry all the time, why?

Its sounds like you're experiencing a clic case of burnout due to stress and depression and you should get that ringing in your ears checked with an MRI. Talk to your doctore as soon as possible. Sometimes this is an indication of a tumor. this can also cause severe headaches, feeling irritated and frustrated leading to anger and anxiety, paranoia..... Best to get yourself checked for a proper diagnosis. A tumor could also alter your perceptions of how others are treating you (paranoia), feeling they're in your face or alienating you as well as cause hallucinations.