"I have just tested positive for Covid-19.I AM OK," the Younger star and Entourage alum wrote in a lengthy Instagram post on Saturday. "About a month ago my entire home (husband and two teen daughters) got an odd bug...," she wrote, sharing her family's early symptoms. "Low grade fever, headaches, sore throat, body aches, ears ringing and a dry cough. It cleared up quickly. Seasonal I thought? but it felt unusual / different... Two weeks later, March 15th, I woke up with all those same symptoms but super intense body aches, and 102.4 fever. I figured maybe I got the flu or..Corona?" Mazar writes that she was initially turned down for a test, but she finally got tested on Tuesday and received her results today. "Today my lungs are heavy,but I’m tough," she wrote. "I can breath,and I’m going to heal here,in my own home!"