Every Since I Returned From A Trip Oct. 5th, My

Every since I returned from a trip Oct. 5th, my right ear keeps popping like I have "swimmers ear", but I haven't been swimming. I sometimes get a little dizzy from it, and I have to yawn, or open my mouth wide to stop it, but it comes right back. I will be going to see an ENT doctor as soon as I can get an appt, but it is very uncomfortable. What could be my issue?