baptism and birth date Fla kommune Hallingdal Busk

Gunild Bottolfsdatter Bottolvshus Tollefson memorial and tombstone https://www.findagrave.com/memorial/68934050/gunild-tollefson the tombstone says her birth date is 6 June 1798, but her baptism info says she was born cira Mai 1798. born Grøslandseie, Flå, Flå kommune, Hallingdal, Buskerud. Baptism: 17 jun 1798 Flå kirke, Flå, Flå kommune, Hallingdal, Buskerud. . if she was born June 6 1798, she was awful young when baptized and that is unusual isn't it? Can anyone help me find birth info for her This lady is step sister to my gr gr grandfather. thank you so much for any help. if it is more convenient, my email is [email hidden]