Head movement and pitch changes?

Hello! I can manipulate the pitch by moving my head into max range of motion in some positions, the easiest one being chin to chest. I find this very strange. Anyone having the same thing? Overall I find my tinnitus is affected by physical changes quite a bit, sauna, gym, nicotine make it worse and so on. Doctors are not very enthusiastic regarding this, I'm unsure how hard to push for MRI and such, the current diagnosis is probably hearing loss related tinnitus. I just find it very strange hearing loss related tinnitus could be manipulated like this but what do I know.