Christina Applegate has announced that her daughter, 13, has been diagnosed with POTS. Applegate’s daughter, Sadie, spoke out about her condition in an episode of Applegate’s “MeSsy” podcast on Tuesday, June 25. Christina Applegate reveals 13-year-old daughter Sadie is battling POTS “I have something called POTS,” Sadie shared. “I was like, ‘Oh, I kind of felt that way too.’ I …