I suffered pprom at 16 weeks in my twin gestation and lost my boys at 25 weeks. in my next pregnancy should my cervix be stitched/sewn?

Not necessarily.: It depends on your other obstetrical outcomes too; your history does not mean you have an incompetent cervix that merits cervical cerclage placement. I am sorry you had such a bad outcome with your previous pregnancy, however if you have a singleton pregnancy next time your risk should be back at baseline (11-12% for the U.S.). Take Folic Acid 1-5 mg daily from now on to prevent sptd.