My 7 week old breastfed baby won’t sleep longer than 45 minutes at a time at night, and I’m struggling! I’m only managing to get about 3 hours collectively each night. I’ve tried what feels like everything. He only sleeps in 45 minute chunks during the day too, and I’m trying to be very careful about wake windows. Before 6 weeks he was sleeping 4/5 hours at night, I’m hoping this is a growth spurt, but beginning to feel a bit helpless. Any tips/advice would be greatly appreciated.