I am nine weeks pregnant and just had an ultrasound done. My baby is the same size it was at 5 weeks and hasn't grown in the past 2 weeks. When checking the heartbeat they noticed that it is very irregular. It will beat three times, than pause for a second or two, then beat three times again and pauses. I am really worried and don't know what to do to avoid a miscarriage. If anyone knows anything please help me!!