slow blood clotting?

NJLH

Is anyone familiar with this? My DD was at CHOP a few weeks ago for constipation tests. During a bloodtest, they found out her clotting levels were low and didnt do all the procedures they had planned to. Her bloodwork showed shes low in vitamin K and D, which help clotting. She was put on supplements, but meanwhile, the GI wants to run other tests to figure out whats causing it. One test is for CF which freaks me out, especially because I'm pretty sure she was screened as a newborn (I'm looking into this). Has anyone dealt with slow clotting? What was the cause? Thanks