And I know this is classic 4 month sleep regression but I wondered do I just go along with it or is there anything I should be doing to help her sleep longer? DD is EBF and co-sleeps. From newborn she slept well, going 5 to 8 hours at night so it's a bit of a shock to the system having to feed her every 3 hours! How long does this growth spurt last for? So many people have said to me to feed her baby rice / formula to 'fill her up'. Thanks