Well this was a little confusing and I noticed no replies,
Breeding hedgehogs is a really finicky, tricky area. Before you allow your female and male to play together you should be FULLY prepared for babies. Females are induced by being exposed to males.
Because there was blood, even if it is a miscarriage you need to take her to the vet immediately. You didn't find the source of the bleeding and it could be any number of things, like rectal bleeding or she's bleeding out of other orfaces..
I also would stop allowing them to play together. Hedgehogs are solitary animals and they won't miss each other if you stop allowing them to play.