I am surprised by your doc as he can take a blood test and have it checked to see if you have ever had chicken pox as the VA a couple years ago wanted to know if I had ever been inoculated for shingles,,,and I told them that I couldn’t remember if I ever had chicken pox. They did a blood test and found out,,I hadn’t ever had chicken pox and you definitely do not want to be inoculated for shingles if you haven’t experienced having the chicken pox. You can get chicken pox at any age I was told by my VA docs. I would call the doc back and see what he says.