Preeclampsia

I'm currently 34 weeks pregnant and at my last visit a week ago my doctor informed me that I've been passing protein through my urine every specimen I've provided; which has been every appointment. So she asked me to provide a 24 hour specimen which I did of course and my next appointment is Tuesday, she'll be providing me with insights and test results. Has this happened to anyone else? None of my friends has had it. Could it be another reason for me passing protein? I'm a little, well a lot nervous about it I read preeclampsia can cause premature labor or a small baby