so if my pelvis doesn't open up , does that mean they have to do a c section or ?

So it is opening, just slowly. You might go past your due date unless your doctor wants to induce

ok n my due date is Tuesday n I got checked Friday n was only 3cm dilated @babes101116 @mimiz

If you don't dilate they'll probably try to help and induce you and if it doesn't work then yes

They could try inducing you