31 weeks with twins

im finally thirty one weeks with my twin baby girls i am sooo exahsted i want them to grow to a healthy steady weight i do not want to go into preterm labor but im in soo much pain it hurts my pelvic bones to turn in bed at night or to even sit up whenever i sneeze or cough my pelvic bones crack :( im really anxious for them to arrive but im also afraid i will have to get a c section because last week i was toldthat both of my girls are tranvers i was also told that my belly is too small hmmm we will see how it goes