I thought you could only get them once?
Unfortunately, that's not true. I had chicken pox twice as a kid and shingles as a teenager. Then in college I had a series of eye problems that were assumed to be caused by the same herpes virus that causes chicken pox. When I told my daughter's pediatrician my history, he couldn't assure me that I wouldn't get any of the above when she got chicken pox. Fortunately, I didn't, but I wouldn't be surprised anytime any of them cropped up again.