Toddler refusing to walk

Yesterday I picked my 2 1/2 y/o up from daycare and the teachers told me that she had been complaining of a sore toe. She was refusing to walk, and wouldn't let anyone near her foot. They at first said that they thought that her toe nail had gotten caught on her sock when she was sleeping, and her toe had bent back.
We took her home, checked her foot and leg, and everything seems fine to us. No swelling, no bruising, nothing. We can manuever her foot and toes in any direction and nothing seems to bother her...until...she goes to walk.
She won't walk by herself anymore, will occasionally let us hold her hand and walk a small distance, limping, but then she's back to crawling again.
This morning I was told that she had also fallen over in group time and that this may have been when she hurt her leg. I thought it may have just been psychological, and she might just be scared, but Im now concerned that she may have done some damage.
But surely if she had fractured something, or sprained something we would notice when we tried to move the foot?

If it were Daniel Id get it checked cause although you might not see anything wrong I'd be concerned by the behaviour and wanna know for certain if it was something physical

Probably she is a bit nervous about it if she hurt her foot. I agree with the others though and I would get it checked out to make sure that it's nothing physical.