rumbaling sound in my ear

i have this problem thats causing me a lot of anxiety it's this rumbling sound in my ear i can hear when i cover my ear but it gets much louder when i yawn or move/stretch my head i have tinnitus but i don't think there connected please help i have had this for about 4 months tinnitus for about a year

[RadioAstronomyObserver]

  I'd like to take a stab at this.  I don't know enough about how this works but I do have a discovery channel concept, so-to-speak....  When you plug your ears with your fingers you are creating a pressurized chamber.   As your finger moves, even nearly imperceptible moments, you are creating high and low pressure waves in that chamber mimicking the high and low pressure changes that are sound pressure waves and moving the ear drum.

  The other parts, yawning and such, there were threads on MedHelp about this, though don't assume I know what I'm saying about your symptoms...  There is a muscle that attaches to the ear drum, and I believe one of the three tinny bones in the ear, and attaches on the other end to the skull that some people have control over that will make a rumbling sound simply by moving the ear drum.  This is noticed by many when yawning and stretching.