When growing up many hormones in your body help develop you mixed emotions. It can cause your to feel a variety of ways. It is a natural thing to experience. However, constantly getting angry and yelling is a sign of depression. Most teens fall into depression in their teen years. I myself also have many emotions. I constantly feel anger, however I have ways of controlling it. I can constantly get upset, due to the many of mixed emotions as a teenager. I would suggest you talk to your doctor about it, and try to see a specialist to see if you have depression. If something is on your mind, I would also suggest and try to talk to your parents, or someone that cares. Sometimes people can feel sad and angry about something on their mind, they just need to let it out and tell someone else about it, so they can feel better. Remember, this feeling is completely normal, there is nothing wrong with you, many teens experience a variety of emotions and anger through their teenage years, as your body goes through puberty, and into adulthood. Overall good luck
, and try to stay positive