No Yael dont think your a bad mother...Little ones can be so quick. I remember being at my mums house(2story house) and they had a gate on it but they were taking things down stairs and before we knew it my daughter went straight for them. She didnt fall but sheeesh they are quick... Dont beat yourself up about it...and I agree with jillian why didnt they do a x-ray when you went to hospital.....???? Let us know and im sure things will be ok...

Missy