Contractions orr?

Sara

I am 37 weeks but he's measuring 2 weeks ahead (if that matters lol) but this morning as i was making my boyfriends lunch i had bad cramps and it hurt like in my booty too. It was off and on for probably 10 minutes. Then it went away. Well i just started cramping again and again it hurts up in my booty too. I know 100% i am not constipated (i went this afternoon, tmi) could they be contractions or something else?