A lot more cm than usually

Today is the day before my fertile period and my cm is thick and sticky which is normal it this stage in my cycle.
​But I have lots today need to put a panty liner and clean underwear on as it's soak my pants. This is very unusual normally my cm is not than heavy ever.
​I haven't change my diet and only take folic acid also it doesn't smell and isn't uncomfortable so wondering why the sudden increase and is it a good or bad sign before ov?