I have suffered from Tinnitus as well, and it is hard very hard to get to sleep. The dr's think I had a ruptured ear drum. I had no idea that I had a ear infection. Still go to the dr. and see what they have to say. It did eventually go away, but I still have a bit of ringing at night. why I have no idea, but it is there, only when I put the my head on the pillow on my left side. Also, have a fan on full blast in the room so it masks some of the noise. good luck, Praying for you child as well.
Karrie