I know that there are several co-mobidities to BP, one being Chronic Fatigue Syndrome.
Your physical symptoms could very well be a co-morbid factor which will trigger a mania/low when the symptoms arise.
Just a thought...if your doc doesn't listen to your complaints & doesn't address them, just writing them off as depression, why not see another doc? Get a second opinion.
Hope you find the answers you need!