Anyone notice more colestrium close to labor?

Has anyone noticed more colestrium production right before labor. I'm 40+5 and ready for baby. I had off and on stomach pain all day yesterday, I'm guessing BH's and today I've noticed if I squeeze my nipples colestrium is coming out. I haven't been able to get any out this entire pregnancy without pumping until today. Anyone happen to notice anything similar before going into labor?  How soon did labor happen?  Thanks. 
I also organized my pantry and laundry room Monday, nesting I suppose.