2D or 3D drawing ?
At a guess, you have a Workplane issue.
Save the File with a Different name (keep the original file)
Make the Workplane visible ... then Revolve the Drawing to see it's orientation.
If it's messed up, then Reset Workplane via World .... or Set Workplane via 3 Points on a Flat 2D object >> Then Select all and "Place on Work Plane"