Mama, please go to your OB or the hospital agad, ha, at 38 weeks with belly pain, lower back pain, AND involuntary urination, kailangan niyang i-check ka properly ngayon na, especially since you're so close to delivery. Hindi ako makakapagsabi ng sigurado online kung ano yan, pero alam mo na dapat ka nang makita ng doctor immediately. A few of us moms nag-experience ng similar things near the end, pero lagi dapat i-confirm ng professional kung normal labor signs o may ibang issue. Huwag mag-atubili, go now!