Sinuses exist in places other than behind the nose ... so internal congestion seems possible. Changes in air pressure can cause this sensation, as well. For a full round of tests and treatment possibilities you can visit an ENT specialist ... maybe you have the beginning of a slight ear infection?
I think u have mild case of TMJ. I have TMj, I feel head pressure, ear popping, earache at times, sensitive to noises, crushing of paper like noise in 1 ear, feeling weird from chest to head pressure like feeling, head feels like swinging or cramping sometimes. Very hard to explain the feeling, these symptoms come and go.