Jaundice scare -Please help

Does anyone have any jaundice stories? My son was born Sunday and his bloodwork Monday showed his levels at 6.9. Today we took him to the doctor for a recheck and he was at 14. He said its nothing to be concerned about but we should come back tomorrow to recheck his bloodwork to see if we need further treatment. I know it can go up in the first few days of life especially if they used a vacuum during delivery but it just doesn't make sense to me to wait if it's doubled in 2 days. What do you guys think? Starting to panic here /: