Im devastated

I've just found out im suffering a miscarriage 😭 my partners daughter who is 8 jumped on my stomach this morning, since then I've been in excruciating pain and started bleeding heavily about 30 mins after. I've been to the out of hours doctors who have confirmed and im absolutely devastated 😢 I cant help but blame his daughter and him. His daughter is a handful and ive had to tell him on lots of occasions to control her more and lay down some rules but he doesn't and she gets away with everything. I have a 9yr old son too. He didn't even tell her off for jumping on my stomach too and that's really upset me, his daughter knew I was pregnant so I don't know why she would do that. I now feel I cant move past this and feel like the relationship is over, I dont know what to do im just so upset. The first thing he said to me when I came back from the doctors after telling him was is it my daughters fault? Not how are you, or im sorry.

EDIT his daughter jumped on me with alot of force and dug her elbow into me which has left me with quite a big bruise

EDIT the doctor I seen said it was more than likely the impact on my lower stomach that caused me to lose my baby, I have bad bruising to my lower stomach as a result of this. Im really struggling to not feel the way I do but I can't help it, she jumped on my stomach for my reason at all and shes not the smallest of kids and is quite over weight for her age, I can't help but feel she jumped on me with intent to hurt me as she is very jealous of mine and her dads relationship