First rule is don't panic, it may be something really banal, like bit of stress. Second rule is to get it checked out. Especially if one sided and loss of hearing on that side. My own experience.
Hope so. Have you noticed how it goes away while near running water like river or in woods?
I'd still go to see ENT specialist, as said my personal experience, can share more in PM if you want.
First rule is don't panic, it may be something really banal, like bit of stress. Second rule is to get it checked out. Especially if one sided and loss of hearing on that side. My own experience.