I've heard some empaths have gotten so overwhelmed they subconsciously 'shut off' their ability, but it's semi-permanent. [Like a mental breakdown, you can't just have one for a few hours] but some people are good at reading body language and situations. Another is if there's an argument a few minutes before you arrive, the 'atmosphere feels heavy' because you can feel the energy in the room. Many people [witches and non-witches] can do these things, learn how to cope with it. I don't know how to ignore basic human kindness. [Without completely shutting down emotionally which isn't fun]
For spirits bothering you it could be a combination of you sensing the rooms energy [again if there was a fight before you entered] but if you are so bothered by spirits and energy do a regular cleansing and protection at least of your house which will give you a neutral area to relax in. The empathy of animals and other people is a fine trait to have but find a coping method to ground the energy and clear your mind of these things. Otherwise your mind becomes a cluttered attic of junk that weighs you down. Meditation, journaling, burning letters, might help you work through things.