5 Days Ago - I Fell Down 9 Stairs Head

5 days ago - I fell down 9 stairs head first. There was no LOC. I was dazed for a few minutes - but otherwise no acute confusion.

I had a CT of both my head and neck 3 hours later which were both deemed unremarkable.

But I have had intermittent and mild epistaxis since and felt as though in a fog - but have not been acutely confused.
As the CT was unremarkable - should I still be concerned? I think it's too early for a subdural - isn't it?