Unusually large amount of discharge?

I'm not ovulating, it's not itchy or anything. It is clear and mucusy. It's like what you'd normally get when you're not ovulating or on your period, there is just A LOT of it. Like it's dripping into the toilet when i use the bathroom. I should start my period within the next week. Should i be worried about this at all? Why could it be happening?
EDIT: i am also taking amoxicillin for a sinus infection!!