Any history in your family of high blood pressure?
I would recommend following up with your physician; you might be hypertensive.
One can have symptoms such as the ones you had with high blood pressure or hypertension.
I would see a chiropractor, you may have some misaligned vertebrae out in the neck region, and they could be pressing on nerves causing the ringing and "full" feeling. After a few treatments, you should be better.