can a person who has power of attorney over me have me stripped of my parental rights if i move out of the house?

The power of attorney does not give your mother any authority beyond what is in the document. Your mother would need a court order to take away your parental rights. You may want to consider whether it's a good idea to have your mother as your power of attorney if she makes such threats. As your power of attorney, she can only do the things that you designated in the power of attorney document. She is supposed to act for your benefit, not according to her own opinion or benefit.