Thoughts about symptoms ( a little lengthy)

This is my third pregnancy and I have been induced for the previous 2 births. I have been told by my doctor I have irritable uterus. I have been experiencing contractions and Braxton Hicks on and off for almost 2 months. I am currently 29 weeks. 
I have been told to take off work for a week to see if that helps. 
Lately I have been having pressure in my lower back and my stomach stays tight all day. In the evening it is the worst and uncomfortable. I have also been feeling nauseous again (on and off) and loose bowels but not diarrhea. Could these be signs of impending labor? Thanks!