Aww, I understand your worry, mama, incompetent cervix is really stressful to deal with during pregnancy. Hindi ako personally na-experience yan, pero one of my close friends used a pessary during her second pregnancy after she had a difficult first, at she did carry to near-term which was such a relief for her; best advice ko is to really trust your OB on this one kasi very case-to-case talaga, at they can guide you better on what worked for others under their care din. Sending you lots of strength and positive thoughts, I hope your journey goes smoothly!