Opinions?

Over the past months I have been overly sad and felt empty.kind of numb to emotions.but when I wasn’t feeling like this I was either really angry and irritated to the point that o was punching things or I was so off it. I just feel like no one understands the is listening to me, and when I try to talk it’s like it goes in one ear and goes out the other. Is this depression? Or something else normal?