I Feel Like Im Bobing Back And Fourth Sometimes Up

I feel like im bobing back and fourth sometimes up and down like on a boat up and down not to much any more use to be bad I have ringing in my left ear I have hade this for about 6 years I have been to doctors hade head scan for tumor came back negative very stressful tired wish it would go away I did read in a medical book manganese could be the cure I acualy tried 4 a couple mounth and didn't feel like I was on a boat but thene I red it could be harmful I stoped what do you think