Sorry about the TMI to follow.
Everyone is pegging this thing well.
It's near impossible to pigeon hole this, exactly.
It's definitely man made.
It is probably not an arrowhead, for the reasons BosnMate stated.
Everyone wants to call everything an arrowhead, but,
it looks as if the bow and arrow didn't appear in the New World until very late.
If man has been here, say 14,000 yrs. ... the bow and arrow is only, say, 1,300 yrs. (in the New World)
So, these things fall into the general category of "projectile points", ... which is then broken down to spears, atlatls, and arrowheads.
Do you see the one flake scar that runs back and squares off, from the tip ?
It appears newer. Maybe nature somehow forced that over a thousand yrs or so ... maybe someone dropped it on the kitchen floor.
Anyway, that is referred to as an "impact fracture".
We have no way of knowing if this piece was once longer and symmetrical, and used as an atlatl dart point.
They would often suffer impact fractures and be replaced on the shaft.
The damaged pieces could then be resharpened and used as knifes or scrapers, where the symmetry wasn't important.
As it sits, now, I think knife or maybe scraper is the correct call.
But, it may very well have been an atlatl dart point at one time.