im 33 weeks and might be getting ready for labor???

for the past 2 weeks ive had loose stools but todaybive gone twice both being the runs...im also having terriable cramping at the bottom of my belly pretty much hip to hip...i remember with my first pregnancy which i gave birth at 38 weeks the day my water broke i had the runs but no cramping i went number 2 then when i was done water trickled down my leg...but with this one im having major cramping should i call my doctors? does it sound like labor? it takes my breath away