My doctor told me the best gauge for amniotic fluid vs urine or discharge is to lay on your side for half and hour then stand up. If it gushes out, then it could be amniotic fluid and you should probably call or go. When laying down it will pool then gush when you stand up.
I am also of the mentality better to be turned away because it is not fluid leaking than to be leaking fluid and not doing anything about it.