ADD-ON: I just want to add that for about 10 days after my initial hit, I heard a light ringing in my ears. It stopped until this morning.

After my incident this morning, I have it again. It is very light and I almost have to listen for it to hear it.

In both situations, the ringing came and went randomly and lasted for about 15-20 seconds. This ringing only happens in my right ear for some reason.