So my appointment went absolutely great today, twins are doing great and growing perfect so far . 30 weeks and baby a 2p12oz and baby B 2p15oz .. well I got a call two hours later saying I tested positive for fetal fibronectin Test and that I need to be at the hospital tomorrow and Sunday morning at 10am to receive a shot at the labor and delivering area ... wth does all this mean ... google is terrifying me ! Help me please ladies .