Uy, 37 weeks na! Listen, ang constant back and lower back pain with a tight belly ay kailangan i-check ng doctor agad, hindi rin kami dapat mag-assume kung normal lang yan o something else na kailangan attention. A few of my mum friends nag-experience ng similar, pero every pregnancy is different, kaya please don't wait, mama, call your OB or go to the hospital para ma-examine ka properly, especially ngayon na malapit na ang due date mo. Alam mo yan, better safe than sorry when it comes to baby.