I am 6 weeks 4 days pregnant today. I went for a scan a week ago and baby was measuring 4.2mm and heart rate was fine. Went for another scan 5 days later as I’d had some brown spotting on and off, and baby’s heart rate has slowed down and baby has only grown to 5.1mm. Booked into the early pregnancy unit in a few days - should I expect the worst or is there still hope?