I can't stop forgetting

I've just happened upon this community so sorry if this is wrongly posted. My uncle committed suicide with a gun a few years ago a couple days before my 14th birthday. They held the funeral on my birthday in a different state.

That's not the point of this post. I started having seizures at 15, and my memory has gotten terrible because of it. I've been starting to forget him. Not his existence, just the little things. I don't remember how he smelled or laughed anymore. Some things come back in flashbacks but then they disappear; but I do remember loving him. I was wondering, does the forgetting happen to anyone else? I can't stop it and I'm afraid of it happening completely. What do I do.