"Mindtapster"
writes

He cries, Beepers all night in of all places..
the bathroom?! Well, I usually get up hold him
tell him everything is ok.. HE SCREAMS in there
pretty loud.. I get worried, because I live in
an apartment too...

Did he start doing this recently or has been doing this for a very long time?
Has anything changed to cause his crying? Can you let him sleep in the bedroom
with you?