I Have Been Hearing Like A Heart Beat In My

I have been hearing like a heart beat in my right ear. Had it for awhile. Prior to that I notice I would be dizzy. I noticed if I press behind my ear it stops. Now there is like a feeling of fullness. I went to the doctor . he look in my ear and stated it look fine.I do have a bad tooth on that side in the back that need extracting. Could this noise be coming from this tooth. Or should I be worried