Also just FYI... Kinda ironic as I just watched a Netflix documentary on early humans last night. The current active working theory on the human ancestors that settled North America is based around the Clovis people.
If you do a search of Clovis tools, they all come up looking like this:
Again, not that what you're holding isn't a possible stone tool. But it's probably not a weapon as the Clovis people were already using edged tools by the time they came to the Americas. And they are considered the orignal settlers of North/South America if I understand the documentary correctly.
The problem with stoneage tools that don't have obvious indications of human interaction is that how do you tell them apart from a rock. The answer? You can't. I'm sure plenty of rocks have been used by ancient and modern people to hammer something into the ground for instance. So technically, every rock you find, "could" have been a stone tool.
You can check out this guy:
https://youtu.be/Fe-uaWRIiPM
He would probably agree with you that what you're holding is a primitive stone tool.
But that line of thinking is about as good as this one as it pertains to proving god exists:
https://youtu.be/2z-OLG0KyR4
So in the end, maybe you have a tool, maybe you have just a random rock. Either way it's a pretty cool looking rock.