New apt and lost stuff

Today marks the second day of searching for a white board we purchased on Wednesday.  We bought it, (along with a few other things) came home and watched a movie then went to bed.  Yesterday, after I got home from work, I wanted to put it up, but couldn't find it!  We have looked everywhere! It cannot be found.  I kind of remember placing it behind a door or something to protect it, but I have no idea...  oh well, maybe we left it at walmart