Way too much cm TMI pic

I was going to the bathroom when I noticed that there was a lot of cm coming out. My period is supposed to start tomorrow and I usually have some creamy cm then but never this much. I'm worried that it might be a yeast infection or something although it doesn't itch (it is white although the lighting in the bathroom makes it look a tinge yellowish, it doesn't have a bad smell either, and this wasn't even half of what came out)  and this is my first day having this type of cm. I have been having cramps but other then that no other symptoms or reasons this might be happening. Please give advice, should I see a doctor or wait it out a couple days to see if it improves?