Can u be pregnant w/o and increase in cm??

Cassi • Single Momma of Four Graci 5-7-15 Graeson 9-7-16 Gabriel 8-6-19 and Gwendolynn 6-20-22! Angel Momma.
Im in my 2WW and i have yellowish slippery cm this morning and not i have pasty white cm is that good or i dontmproduce that much to begin with i use preseed