Hammer deleted most of my map

[adventurejoe]

I was working on a single player map and when I compiled it didn't work. I used interlopers compile checker and apparently hammer made both infinitely large and infinitely small brushes. I deleted them and that fixed that. But then when I compiled again I spawn in at 0 0 0 and most of my map is missing. Hammer still shows everything there. I restart hammer and sure enough most of my map is missing. I don't know if the map corrupted or something but I could really use some help. Thank You in advance!

[Aus_Karlos]

Check to make sure your not hiding anything with the VisGroups.
Also in the map directory where the vmf is saved hammer maps a backup map_name.vmx.
The Vmx is created prior to a save just incase saving the file causes it to become corrupted.