Forum:Lily has gone missing

The other day I was doing that quest in vault 22 "There Stands the Grass" and I got to the part where You can blow up the spores. I went to level one in the vault and fired Rex and Lily. Now I can't find them at lucky 38. I am positive I sent them back there and have successfully done so in the past. I've checked the locations they are originally from and they are not there. I'm alot further now but would like Lily and Rex back.