Eliana's mad at me.

I mistakenly cut Eliana's toast in half.  She bursts into tears then ran upstairs to her bedroom.
Then she called me upstairs.  When I got there, she looked at me and said "No Mommy. I want Daddy"
Now she's ignoring me.  If I talk to her she glares and walks away.

She's 3.  going on 13?