Afternoon,
This is something of a long shot, but its possible that is a pottery smoothing stone. When you find a piece of Indian pottery that has a good polish on it, ever wonder how they managed that? Well before the ware is fired....cooked in a hole till its good and hard....they polish it with a small oval pebble such as the one you have a photo of.
Not saying that is what you have, but that is what one would look like if you did. Normally the terminal ends are more highly polished than the rest of the stone...they are not usually very large and are usually oval in shape something like a large jelly bean.
Just a thought...it could just be a rock....LOL. As I have said before, location, location, location. If there is a ton of Indian stuff where you found it, then its more likely to be an artifact than a geofact.
Atlantis