Protein in urine! Freaking out!

Jennifer
Went to the doc on tues had BP of 189/90 ( Very high) they did a quick test and found protein in my urine. Ordered a 24 hr urine collection. I finished that yesterday and my results are back and crazy high for protein. ( 589 total protein ) I know these are the symptoms of preeclampsia. But I don't understand what preeclampsia is or how to stop it. Currently waiting for doc to call me back. Anyone else been through this?