I have found that deep breathing really helps me going into a simular situations. I focus more on my breathing than my anxiety and on my worries about questions. And if you dont feel comfortable with a question, maybe just very politely say that you do not feel like discussing your health with anyone at the moment. I have noticed that if I say something like that my family usually leaves it at that. I make it clear that there is no way that I will be discussing anything of that nature with them. Also just beat around the bush and come up with something else to talk about.