Test results

So I just got a call that my levels are off and as a result I am at an increased risk of having a baby with Down syndrome. They say they need to run more tests and it's nothing to worry about just yet, but I'm really upset. I go to see a genetic counselor today at 4. Does anyone have any experience with this situation? I'm a nervous wreck and can't get in touch with my husband! I am 13 weeks today.