Things that come in the night

Last night on L & D we were super busy and running around like crazy when we got a call from the ED that they were bringing in a lady by ambulance who was 8 months pregnant and in labor. She gets there and one of our MA's was having a hard time finding fetal heart tones and could only find the mom's heart rate, so she calls us in a panic to come in and help. We're thinking now we've got a dead baby on our hands, which is enough to ruin anyone's night, and the doctor brings in an ultrasound machine to see what's happening with the baby and find its heart rate.The patient tells us she's been feeling her baby move a lot, tells us who her OB is, etc. After a minute of looking with the ultrasound the MD declares, "There's no pregnancy here- you're not pregnant," to which the patient calmly responds, "Oh." The doctor asks, "What brought you in to the hospital tonight?" The patient states, "I got depressed and drank two liters of soda." With a quick "Alright then!" we packed her up and sent her down to the emergency dept- I'm still not sure for what (gas bubbles?). Night shifts are always more fun when the crazies show up.