Preeclampsia? Early? Why testing!

Heather • Second pregnancy! Due in feburary of 2016!
I had preeclampsia really severe with my first daughter. My doctor wants to take precatutions in case I get sick again this pregnancy but she is doing the 24 hour urine collection to test for protein in my urine and I'm only ten weeks along. Is it me or does this seem just stupid. It's so rare to develop preeclampsia before week 20. 
Has anyone been diagnosed this early?