Waalaikumassalam sis! Dengar je nama "ketulan dalam kantung" memang scary, tapi jangan panik dulu, doktor tu yang tahu best mana, so trust his/her guidance lah. Since doktor sendiri tak certain, kena follow up dengan scan lagi or get a second opinion from another specialist to be sure, okay? A few of us mum friends pernah deal dengan something uncertain during pregnancy juga, and the waiting is the hardest part, but proper monitoring makes all the difference. Stay strong, and keep close communication with your doctor, ask him/her exactly what the next steps are and timeline for checking again. You're doing the right thing by being proactive!