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If you were diagnosed with Bipolar 3 years ago it sound like you are in a depressive stage. You did not mention that you are seeing a psychiatrist or a therapist. Both of those are very important parts of feeling better. A psychiatrist will be able to prescribe medications to help you feel better and control the Bipolar. A therapist will be able to help you talk about what is going on and how to best manage and cope.
I really strongly suggest setting up an appointment with both of those professionals. Please let me know if I can assist anymore.