Typically your labor starts before your water breaks.. Less then 10% of women's water breaks on it's own before labor. I'm on child number 3 and never has my water broke b4 labor began.
Yes I was in labor and displayed 8cm before the doc finally broke it
Yes you can :) some moms have to have their waters broken for them when they're in labour
With my first baby I had contraction before my water broke cuz my water never broke the dr broke it for me