Positive quad screen

Got a call from the doctor saying my quad screen was elevated and wants me back to talk about things as soon as we can. I'm so scared. I've read there are a lot of false positives for that test but it is still making me nervous. My husband is so worried. He's more angry the nurse couldn't say much over the phone. The soonest appointment they could do for me is Thursday and it already seems so far away. All I want is a healthy baby! But now all I can do is worry. Any advice ?