The health struggles of Kate, Princess of Wales, have left Prince William and the future queen feeling anxious about Prince Harry’s upcoming visit to Britain. With the princess undergoing draining cancer treatments, the couple is “hoping for a peaceful and quiet environment” to support her recovery. However, a friend of the pair told an outlet: “A visit from Harry, with all the drama that would bring, would be the opposite of that.” “William and Kate are really nervous that whether Harry comes alone or with Meghan, there are going to be difficulties, and a great deal of planning is going on to…