Buka buku pink, scan 2x tak nampak

Scan kat klinik maternity luar nampak. Transvaginal scan masa tu 5week 6 days. Ada yolk sac & dah ada heartbeat. Tadi buka buku pink nurse kata dah 8 week 5 days. (Sebab follow LMP) Confuse sekejap. Then scan doktor tadi tak nampak sebab dah kencing, disuruh minum air still xnampak clear ? suruh scan lagi isnin ni. Bahaya tak scan banyak kali?