Genetics dr surprise call

Got a phone call from the dr saying that my blood work for trisomy 18 etc and down syndrome came back good. Babies are healthy. But she also said that one placenta (di/di) was giving off chemicals that show that im at a higher risk for preeclampsia, low birth rate for one twin and premature labor. She said there was nothing much to do differently. But it made me a lil bit more worried than before. This whole twin thing is new to my entire family, so I have no idea what to expect. Has anyone else gotten this back as a result and their dr given a lil more info on it? I don't really want to Google it because we all know the internet will tell you that you're dying if you get a paper cut (lol-sarcasm)