All my life, I was 5' 2.75". It was always a running joke that the last 3/4 of an inch really matters when you're this short.
I knew something wasn't right when I took my son to the doctor and they measured him at an even 5'2" and he was visibly taller than me. I just found one of those doorway height strips at a convenience store and I came up as 5' even.
I'm only 39, I shouldn't be shrinking this much so young.
You need to get that checked out. Hopefully it's not cancer.