Back labor?

Patient: Im 38 weeks and 4 days, not dilated as of Sunday, and ive been having contractions for a few days now but tonight they were acually strong enough to really notice but were still irregular. I went to bed and woke up a few hours later with ridiculous back pain. i tried everything and it won’t go away. My belly is still tightening like it was with the contractions but im not really feeling the pain in the front like i was before i went to sleep… The pain in my back was enough to keep me awake and make me nauseous… anyone know whats going on or what i should do?