Pregnancy induced hypertension

Danielle • Happily married and expecting a little boy to be born via c section on March 9th!
I went to the doctors the other day because of headaches everyday and swelling in my hands... They said it's too early to diagnose me with preeclampsia or pregnancy induced hypertension because I'm only 16 weeks. However they said I could get it later on... Anyone have experience with this?