Sorry my phone is dumb and changes words as messages are sent. Even if I proof read. Anyway, nurse helpline, doctor, if those don't work, go to the ER. :-)
It could just be braxon hix contractions, but I would call the nurse help line if it's after hours out your doctor if you can to be safe. If you're really concerned, go straight to the ER. Plenty of us have had false alarms but it's better to be safe than sorry.