Hello~It does sound like Eustachian Tube Dysfunction. I would think that possibly high anxiety could cause it, it certainly can cause other upsetting conditions. I have had that feeling at times, usually when stressed and it does go away.
I would worry about it unless it gets worse or you get other symptoms as well, in that case, I would suggest that you see your GP.
This may be eustachian tube dysfunction which I have. When you lay down do you hear a swooshing sound like ocean too? that's another sound. Here is link to the anxiety forum: https://www.medhelp.org/forums/Anxiety/show/71