I wouldn't regress either. She was doing well with finger foods, so just keep presenting them and if she refuses, she refuses. Many LOs go through periods where they refuse for a variety of reasons (teething, developmental gains, independence/control). Just stick it out and try to to make it a control battle or a big deal, and she will likely come around and start eating her finger foods again. As long as your LO is an adequate weight and generally has a healthy appetite, some variation and decreases in amount taken should pass relatively quickly. HTH