34F, 5'6", caucasion, involuntary contractions in throat, muscle relaxers 10mg, concerta 10mg, no drinking, no drugs, involuntary contractions in throat, 2 months

[34][F] 5'6", caucasion, involuntary contractions in throat, muscle relaxers 10mg, concerta 10mg, no drinking, no drugs, involuntary contractions in throat, 2 months

I am wearing noise cancelling headphones, and when I do, I can hear my throat involuntarily contracting. I hear these little "pops", and can feel them as well. I never notice it unless I am wearing noise cancelling headphones. What is this?