Help me- fraternal twins one heartbeat

Photoslave

I just found out yesterday I am carrying fraternal twins. One heart beat is not visible at 8weeks. They said I could be earlier than we think. They said there is hope and to wait another week and see if it developed. Anyone have experience or advice with this? I have had a previous mc and I had bleeding a couple weeks ago. It was about a small tampon full, but it stopped pretty quickly. I'm trying not to be emotional either way, but you know.