Teresa Giudice is having a tough time as a parent. After an intense clash with her daughters at the Tampa International Airport in Florida on Wednesday, Page Six has exclusively learned the toll it has taken on the 54-year-old mother of four. “Teresa just doesn’t know what to do,” a source close to the family said following the heated encounter with Milania, 20, and Gia, 25, that was captured on video. “She’s in a hard position. Her family has been very worried about [Milania].” In the video, Milania is heard asking her mom and sister, “This is what we do now? This is what we do now?” Teresa responded immediately, telling her daughter…