Mama, this is something na kailangan talaga i-check with your OB agad, lalo na at 37 weeks ka na, hindi dapat i-ignore ang recurring cramps like that. Better safe than sorry, especially ngayon na malapit na ang due date mo!
It could be practice contractions, pero kailangan ng doctor mo to confirm kung normal lang or if there's something that needs attention. A few of my mum friends had similar concerns close to delivery, at ang peace of mind from a quick check-up ay sobrang sulit talaga. Call your OB or go to your nearest birthing center para ma-assess, okay?