J.R.
It is possible that she is having trouble sorting out emotions...so every thing just comes out negative. I would try validation. You can google validation and get a lot of examples but basically, try to acknowledge her feelings, find something you agree with in what she says to validate her, then help identify what she is feeling with open ended questions. So for example, she says she doesn't want to go to school and you say, It sounds like you really aren't looking forward to school today. What's going on? And she says, "I'm too tired." And you say, some days it is so hard to get out of a comfy bed, isn't it? Let her respond. Then say so it sounds like school is going okay, you're just feeling kind of tired. I know it sounds painstaking and time consuming but for kids that have difficulties with emotions, it sometimes helps.