Back pain, cramps, pressure

I am 37+5, and for the past couple of days I have been having low back pain that comes and goes. Sometimes I feel a progression of back pain, then rectal pressure, and then menstral like cramps. Are these considered contractions or is it just my body getting ready? Should I be timing them? On Wednesday, I was 2 cm dilated and 70% effaced. This is my 2nd baby, but my water tore last time and I had to be induced because I didn't start contracting enough on my own so this is all new to me, lol. Thanks!