Aww, I understand your worry, mama, preterm birth is scary talaga! With my first, I went back to my regular OB but honestly, a few of us moms here switched to a perinatologist para sa peace of mind, especially since they have more experience with high-risk pregnancies and can monitor more closely. Either way, I'd really suggest talking to your OB about your history and what they recommend, some regular OBs are super experienced with preterm cases din, pero if you feel you need that extra specialized care, walang masama magpalit. Sending you strength for this pregnancy, sis!