Need help separating two meshes that I accidentally put together I'm new to blender and following the 2019 donut tutorial by BlenderGuru on youtube and i'm on part 4 modelling where you put icing on your donut. I accidentally duplicated two icing tops and didn't realize it until I almost finished modelling the icing. 
They're stacked together and the one I haven't modeled is sticking out and I can't delete it or move it away. I may have accidentally merged them together somehow?]2
Select the mesh and go into edit mode.
Deselect vertices.
Hover over the mesh you would like to select and press L. This will select only the verteces of the original object.
Press P and choose selected. This will separate the selected verteces.