It looks to me to be a debitage flake off of a worked piece. The top second picture from the left looks to have a bulb of percussion. Keep looking, you seem to be in the right area.
Definitely finding stone altered by people. I don’t see enough to say definitely a tool but all of my spots I hunt were found thanks to flakes, I suggest picking up as many as you can I’ve found a handful of arrowheads thinking they were flakes, it’s hard to top reaching for a flake and pulling an arrowhead out of the dirt
The bottom left picture . It looks like the upper right corner could be a place for your thumb . Does it fit your hand if you put your thumb there ? Could be a scraper if it does . I was a land surveyor for over 15 years before I had to stop because of my health . I have been working and picked up a pocket full within a short time . I once found a 5 inch spear point that was perfect . I was so happy . And then about 50 ft away I found a even longer , nicer one . Go looking after a good rain shower . BUT I am sure you know that ! Good luck on the hunt .