37 weeks... HELP!! Serious tightening and major back pain?

Danielle • 33yo, first time mom and so excited for it all!! Married 10.03.2014 and we are over the moon about our Nov baby boy!
I'm a ftm.... 
I am getting intense tightening though my entire stomach for long periods of time.... Not always painful, sometimes jus uncomfortable. I also have serious back pain now. And I have moments when cramping gets veeeery uncomfortable low. 
Would these still be bh? I saw my dr. a few days ago and baby is positioned head down and low but my cervix is still closed.
Sleep is mostly impossible.
Anyone have experience with any of the above?