The eustachian tube opens when you swallow, yawn, eat, cough etc ... and it can make a click / pop. Like, when you are driving up in to the mountains or in a plane and your ears pop! Thats your eustachian tube.
If you have had a cold, it might be a bit 'dysfunctional' leading to Eustachian tube dysfunction.
My clicks / pops randomly. That is what I believe mine to be personally, although I am currently under investigations for a larger problem for which this is just a side effect. Not that this is probably the case with you.
if you have had a bit of a cold, or flu - mention this to you Dr and they may prescribe some nasal steriods if they believe it be Eustachian tube dysfunction.
Just my thoughts, from my experience. Dont let it worry you though. I have anxiety too, and understand how Dr's will lump you in to that group every time you present with something new.
