Just found out my 7 week old has acid reflux (born 2-10-15). She s been on the new formula similac soy for two days and since then it seems like she s not getting full long enough. She only gets full on 2 ounces compared to the previous formula which she drank 3 to 4 oz and it doesn t seem to last. She s ready to eat again in an hour and a half two hours. Her night sleeping has changed too she doesn t sleep as long. She was sleeping 3-4 hours throughout the night and now it s every two hours. She doesn t seem like she s getting enough sleep cuz she s hungry. Would it b ok to feed her some rice vereal just at night?