Mama, please call your OB or go to the hospital ngayon na para ma-check properly, hindi dapat i-guess ang ganitong discomfort sa ganitong stage. The pressure and stabbing sensation you're describing needs professional eyes, especially this close to delivery. A few of us mums got checked for similar things and glad kami na nag-go kasi may specific reasons pala, could be positioning, or something else na kailangan i-monitor. Don't hesitate to ask your doctor right away, ha? Sending you care!