when i am in the shower and the water hits my face, specifically the right side, it sounds like a rubber band snapping sound in my ear. sometimes when i am applying makeup with a makeup sponge on my face near my nose i hear the snapping sound. my ear does not hurt and there is no drainage. what could it be. it happens a lot. i also seem to be off balance and sometime suffer from dizziness. I am 47 years old, 5 3 and weigh about 187 (recently gained weight from hypothyroidism). I take lorezepam (2mg) at bedtime and synthroid (25 micrograms) every morning