Sayang, I can really feel your worry, this must be so stressful, especially first baby! But honestly, situation macam ni kena let the doctors guide you properly, especially since you're already referred to the Risk Assessment Centre, that's the right place for them to monitor closely with blood tests and maybe more scans. I haven't personally encountered exactly your situation, but a few mum friends went through confusing early scans and the serial blood tests (HCG levels) really helped clarify what's happening, so jumaat's results will be very important, okay? Bleeding + positive UPT but no sac on scan at this stage IS something the specialists need to investigate properly, could be timing, could be other things, but it's NOT something to figure out sendiri. Trust the process with Putrajaya, do the blood test esok, and take it one step at a time. You're doing the right thing by getting proper care. Hang in there, mama, the waiting is the hardest part.