My 4 month old has been doing pretty well with sleep except the past 3 days. She goes down easily, and used to wake only 1x in the MOTN, but now it's been 3-4 times. Sometimes she will go back to sleep after 5-10 mins of crying, but most times I need to nurse her back to sleep. Is this the 4 month sleep regression? Did you need to retrain, or did it resolve on its own? I also wonder if it could be because we dropped her last nap? I'm not sure what to do. My head is so foggy from tiredness.

ETA: Did it affect naps as well?