Aww, I understand how worrying this is, mama! Pero please follow your OB's advice talaga, bed rest is really important right now, at seryoso lang ang low-lying placenta kaya you're in good hands with your doctor. A few of us moms have been through similar situations, at honestly, ang best thing is to just rest, stay calm, at let your doctor guide you through that ultrasound next week, maraming cases talaga na umiikot pa ang placenta, so there's hope! Fingers crossed for you, at laban lang, mama, you're almost there na!