Early labor or false labor?


So I'm 34 weeks and three days, my ob sent me to triage to do a " non stress test " and an ultrasound to check on my baby since she is a bit small. I got hooked up to the monitors and a nurse came in to check up on me. She told me I was having pretty bad contractions and if I felt anything. I told her no and she was totally surprised! She told me they'd have to do an exam on me so she called the doctor asap. As I thought, my cervix Is still closed. They kept me for an extra hour and still had contractions! Does this mean early labor will be happening soon? Or is it normal.. ( included some pictures of the monitor )