Dresser tipped, hit 3yr old on head but did not land on her. Child cried right away, no bleeding or bump visible. She seems normal. Is she probably ok?

Yes. When something hits a small child on the head or when she falls on her head from a distance of less than 5 feet, cries right away, the chances of any internal brain injury are very very small, as shown by a study at the er of a boston hospital some years ago. So you can be reassured and go on loving her.
Yes. If there was no loss of consciousness and acting normal with no symptoms i would just watch. This is minor injury.