Preeclampsia at 16wks

Has anyone had preeclampsia in early pregnancy? I'm only 15wks6dys (16wks) and was having lower back pain, bad headaches and lots of pressure in my pelvic area so they sent me to the emergency room and they said that I have it cuz of high blood pressure and protein in my urine. I have a follow up with my doctors office to see what is going on. So worried for myself and my little sweet pea. TIA