Being a teen can be an exciting, but challenging, time in your life. It's normal to have some changes in your mood. All kinds of events in our lives can affect the way we feel. If you find that you are feeling really sad, irritable or worried most of the time, or if you are losing interest in things you used to love to do, you may need to come in and see your doctor. Many of the providers at PIP are trained to help you figure out what might be going on and how to help.