Overfeeding a baby can sometimes result in regurgitation, and if they are lying on their back, it may come out through their nose. It is generally recommended to put babies to sleep on their backs to reduce the risk of Sudden Infant Death Syndrome (SIDS). However, if you are concerned about regurgitation, you can try placing your baby in a side sleeping position with proper precautions. Consult with your pediatrician for personalized advice and guidance.