No its not. I had contractions at 32 weeks and had to go to the er. I got a shot to stop them. They'll try to keep baby in there until at least 36 weeks. That's what they told me. I'd go straight to the hospital if I were you
I would call your doctor and let him/her know. Better to be safe then sorry
If your at risk then I would call your doctor being that your not full term yet and being at risk. Hope all goes well.