Nak, this is really something you need to talk to your doctor about right away, hindi ito dapat maghintay, okay? A cervix opening in the second trimester needs medical attention talaga para ma-check kung ano ang nangyayari at kung kaya pa ng baby. I know it's scary, pero the good news is may mga options and support available once nakita ng doctor, maraming moms namin na nalagpasan ang concerns na ganito kaya huwag mag-alala muna. Call your OB agad or go to the nearest hospital para ma-assess ka properly, nak. Sending you strength!