nausous! !!

okay so I am nausous alll the time. been like this for 6-8 months. no I am not pregnant. I taje anti nausous meds they work. doc wont give me more. I did research and they said I might have a case of a swollen stomach but a doctor wont to test on it. been to four doctors. I now have flu like symptoms nausous.. no fever... whole body hurts allll the time. no energy to even hand someone something.... migraines. shakes and im always hot well I always feel like im hot.