Real contractions?

Nicole • Mommy to ID girls. Harper & Paige born 12/28/15
I've called and left a message with my dr. Debating on calling L&D. I'm 33 weeks and today with my twins. I've had terrible pelvic pain/ pressure and my lower belly is so sore. That just started today. 
Starting 2 hours ago I've had pretty regular BH contractions. They have been pretty long and get uncomfortable. It almost feels like waves of gas cramps with the contraction. They last 45sec-1 min. They don't seem to go away with moving positions or walking. Im hydrated and I keep emptying my bladder. 
Has anyone had this happen and it was just BH? Or real contractions?