Did you stand up as soon as you shot?
And hoop, and holler?
Or just sit there quietly?
Did they see you?
If you didn't stand up as soon as you shot, and waited untile they all were gone, you should be able to go back.
If you weren't spotted, they will just think that it was a clap of thunder, and not a hunter.
After all thunder happens in the woods, and they know it.

I hope this helps.

JMHO