If you signed papers in a notary and you signed adoption papers, can you get your child back?

Generally, an adoption can be reversed after it has been finalized by petition to the court by either the birth or the adoptive parents. The laws about when this can be done and the circumstances required for the court to allow a reversal (usually called a vacation or annulment) of the adoption are quite strict. If an adoption is reversed, the adoptee's (child's) birth certificate will be changed back to the way it originally read. Usually the courts will look at the best interest of the child meaning, the court will revoke consent if the court finds that the child?s best interests are not served by the adoption.

Not unless there was fraud or you lacked the mental capacity or you signed under duress.