Hello po! First time mom i have serious question po hopefully may maka sagot po

Hello po! I have question ftm po 🙂 confused lang po if ano po dapat ko sundin. As i remember kase my last menstrual period start last july16 2023. Kaya dun ako nag babased. Via ultrasound sinabe nung ob na edd ko is may 7. Though nagpa check up ako sa lying in na aanakan ko kanina while checking naging april 21 po edd ko so currently 31weeks and 5days na daw po ako pano poba saan ako mag bbased?