People look at me crazy when I call them a Massasauga. Most have never heard that name.Looks like a Massasauga. Typically they don't get much larger than 2', and don't have the most pronounced rattles. Probably not one of 32 little ones hiding around. Hopefully that helps calm you a bit.
I came across a 3' Speckled Kingsnake yesterday with the kids, we watched it for a while and I made sure they understood why we don't kill those.
What I hate is how close the Massasauga and Prairie Kingsnake can look alike if you only see the middle body.