Alhamdulillah congrats on baby no. 4! Sayang, bleeding in early pregnancy memang boleh jadi tapi kena monitor closely, good thing doctor dah refer you to HTAR for proper scan, that's the right move. A few of the mums around me had similar scares early on, and most turned out okay, tapi memang stressful! For now, follow up dengan doctor as scheduled dalam 2 minggu, and if ada heavy bleeding atau severe cramping, jangan tunggu, pergi A&E je. Take care of yourself, and hopefully next check-up semua okay!