Period trouble!!! please help!?

Question

ok i post this question her cause no body in the heath selction answers. well i wanted to know how long before your period does that whitish clear guck come out?

thank you for your answers*

Answer 1

like 1 to 3 days.

Answer 2

When I was in school I think they said like 24 hours before but I think more realistically it varies more like 1-3 days before.  

Answer 3

like a year or two