i used to have the same problems telling with my does. i would say "in the next several hours" for about a month. i've got one who's udder has been growing for some time and shes not due for almost a month. a good sign she's real close is when she kicks at you and milk squirts out. i know this from experience.
the discharge can go on forever, trust me.
your sure she wasn't coming in heat?
your sure she wasn't coming in heat?