Hey, Zepellin. The good thing about your problem is that it's not premanent. Tinnitus or hearing loss is still not reparable, so if the problem with your right ears only appears somtimes, there are good chances that it's no problem with your inner ear.
It could be something with your bloodflow (I hope that's the right word) or some a nerve that is irritated. A good doctor shoud be able to help you.
A few years ago, I woke up and one of my ears was kinda closed so I was pretty scared. When I went to the doctor, she took my head and turned it around quickly. It was a nerve that was stuck and this prevented the blood from coming to my ear properly. Hearing has a lot to do with bloodflow!
Excuse my bad english, it's not easy to speak about medicinical things in a foreign language.
