Lately, I've had this vertigo issue. Anytime I tilt head back and turn to the right side or while I'm lying down in bed turning to the right, sensations of vertigo starts. It starts off with a feeling of lightheaded to dizziness and a few seconds of the room spinning and then it stops.
The left side is not affected at all.
Moreover, every morning, no matter how well or long I sleep for, I'd wake up very lightheaded, like the feeling of being tipsy from drinking although I hadn't been.
At random moments, tinnitus happens in the right ear.
What can be the underlying issue? What can I do?

