Drooling

Has anyone had a problem with drooling? For the past couple of weeks when I wake up (whether it's in the morning, the middle of the night or from a nap), there is always a lot of drool. It's getting annoying. I've never had a drooling problem before. I also don't have any kind of toothache. Even when I've had a toothache in the past I never had a drooling problem. I mean I would drool once and a while in the past but for the past couple it's been every time I go to sleep I wake up to a puddle of drool. I don't know if this is because of waking up to all the drool but I do feel like I'm swallowing more saliva during the day. Has anyone had this problem and do you know what was causing it?