Don't feel badly. It is hard to see birds in the grass and such. So don't beat yourself up.
These are eggs? You will need an incubator. You will need to candle the eggs to see how far along they are so you can guesstimate when to stop turning the eggs.. Do you know what type of bird this was? Where in the country do you live? (this will help determine the quail species so we can guesstimate hatch date).
Dont feel too bad, stuff happens. When I was a kid, baling hay I ran over a wild turkey hen with all her poults that was hiding in the grass. I learned to be more careful after that and never ran over another turkey. The bush hog and my neighbors guinea hens is a different story
Seriously though, if you can find a bator just pop them in and if they're good they should go. I've hatched pigeons and doves out of abandoned nests with good results, quail are no different.
Also, turn the eggs a quarter turn every few hours. Never go 360 around. Just back and forth. So a little to the left. Then next time, back to the right a little. You can do this when you are spraying them.