I would have to say that my pain was 100% completely NOTHING like period pain. I have variously had crippling period pain before, but this was... something else! Worse than any period pain I've ever had, but also completely not like period pain. I also had back pain inbetween contractions, so I don't know if that made a difference, or not. I know I didn't get any rest between contractions & I'm sure that does make a difference.