31weeks and cramping up..

Im 31w 2d, and since i woke up (about 5hrs ago) ive been having BAD cramps. I can feel him pushing his head down and it hurts in my hips and bottom of my ribs.. Its coming and going but its pretty intense.. Ive been out of bed to pee and thts it.. Babys still kicking and was moving around ALOT lastnight so i know hes okay. Im just confused and worried. I hope this isnt preterm labour. Im so not ready for him to come yet. Helpppp.