Ay mama, kaya mo yan! Those signs you're having, the back pain, the tightening, the pelvic pressure, those are actually good indicators na malapit na talaga, kaya just keep doing what you're doing at listen to your body na lang. But since bukas na talaga ang due date mo, maybe best na i-check mo with your OB agad-agad para ma-monitor kung paano ka talaga, lalo na with all those sensations you're feeling, hindi lang para sa peace of mind mo kundi para sure na safe lahat para sa baby. A few of my mum friends din experienced the same thing at biglang nalabasan within hours pagkatapos ng check-up, so you never know! Sending you all the prayers, you've got this, Mama!