Good evening. I'm at 30-31 weeks of pregnancy. So, since last night, I…

Good evening. I'm at 30-31 weeks of pregnancy. So, since last night, I have been experiencing pain in my abdomen and back. It's really painful. I'm afraid I might have premature labor. My first child was born at 36+1 week. It was an emergency C-section. Weight: 2100 grams, height: 47 cm. So, I'm afraid this pregnancy won't go full term. Share your highest experience ?