Boleh je pergi scan, tapi honestly at 5 weeks most clinics akan suggest tunggu sikit lagi sampai 6-7 weeks so they can see the heartbeat clearly, that's when it becomes more meaningful. A few of my mum friends pergi awal-awal juga, but mostly untuk peace of mind or kalau ada bleeding. Best to call your clinic and ask, they'll advise based on their equipment and what they can actually detect at that stage, yah?