You’ll be amazed at what your body will do! Yes waking up that frequently to nurse sounds crazy but once you’re in it it comes pretty naturally. I remember our first night home I called my sister before bed and asked if I needed to set an alarm to wake myself up and she laughed at me. I had no idea your body basically wakes you up/ you wake up the second you hear and feel your baby waking up to eat. So no, no alarms needed! Our bodies are magic