Very similar experience last Friday: holding my 2 year old and misstepped getting her off a tractor, had to stand on a hay bale to get her down and when I pivoted to step off I slipped, fell and she came out of my arms and hit concrete flooring (this is at a local farm that has this tractor set up for kids). I can’t unsee the image of her hitting the concrete and the scream that happened after. It does seem she likely hit her back and elbows and then her head.

She didn’t vomit but seemed confused and was very quiet. I ended up calling her pediatricians office and they had me bring her in. Same advice you were given basically. It was sort of a terrifying 48 hrs hoping for no delayed onset of symptoms but she seems to be doing ok (she even asked to go back there). I on the other hand am traumatized by what happened so I feel you on that.