It could be either natural mood swings or the start of a mental disorder. By the sound of it depression. I noticed you haven't gotten any replies on this thread. Depression can cause mood swings and dysphoria. Anxiety is common. But it probably was before mild or worse and became more severe. I suggest you go to therapy and see a psychiatrist or psychologist. You need treatment before this gets any worse. I hope that helps. We can't diagnosis here so a professional can only do that.