Hi. Your step should be to approach a psychotherapist or a psychiatrist for a formal diagnosis. Self-diagnosis is usually erroneous. A psychiatrist usually prescribes medication to reduce the physical symptoms associated with your diagnosis. A therapist/psychologist/psychotherapist will help you address the underlying psychological isssues causing you physical and mental discomfort.
Next Steps
If you are diagnosed with bipolar depression or any other psychological problem, it's best to compliment medication with therapy sessions. If you don't want to rely on medication, consider going for long term psychotherapy. It's going to be much more intense and require you to put more commitment in order to substitute medication with your own treatment for your mental health.
Health Tips
If you have any other questions, please feel free to consult me. Good luck!