5'4" or 5'6"

Am I 5'4" or 5'6"? When I was in high school, I was 5'6". The last time that I went to DMV, I told the guy that I thought I was shrinking as I am getting older. I asked him to measure me. He didn't but he left a surprise on my renewed drivers lisence. I didn't check it right away but when I looked I found out that he made me 5'4". Great. Thanks a lot. I am 5'6".