Vomiting after fall

I need your opinions! So my 13 month old was walking on the sidewalk, she tripped, fell to her knees, and somehow managed to bump her head. It originally swelled up pretty big, but has gone back to normal. I checked her pupils and breathing and she seemed fine all day. She was her normal self.

Just now I went to check on her and she had thrown up in her crib.

She did wolf down a big dinner before bed.

Do you think the head injury and vomiting are related? I’m a little worried now