Preeclampsia question

Emily • 22. Married. Have one angel baby (1/19/14) and a baby boy (12/4/14)
I stayed overnight in the hospital due to high blood pressure, headache, & dizziness. I'm 38w tomorrow. They started a 24 hr urine test checking for protein for preeclampsia. The test won't be finished until tonight. Does anyone have experience with this? If I do have it, will they likely delivery the baby asap? My face is a little puffy but otherwise I'm not swollen.