Threatened Misscarriage

Hi Mommies, I had heavy bleeding with a big clot 3 days ago and was brought to hospital. I am 12 weeks 3 days pregnant. When scan by doctor, baby still have heart beat, doctor mentioned it is threatened miscarriage. He asked me to monitor for one week, and go for scan again. Still having slight bleeding now. Any mommy experience like this before? And will baby be ok? :( so worried now, as I have experienced 2 misscarriage before