Baby keeps hitting phase

Katarina

My little girl is going through a horrible phase !!! she keeps slapping (and I mean hard!) me in the face, others too if they get close enough but usually I am the only person who does. she slaps me hard in the face, pinches lately and pulls hair. and the worst part is if you say no, or say ow, she laughs and laughs.

help!!!!

is anyone else going through this ? I don't know how to break her of it.