I don't understand, it just seemed like we had established a routine, …

I don't understand, it just seemed like we had established a routine, but everything crashed with a sudden growth spurt ? Is this a growth spurt? Regression in sleep? We used to sleep soundly for 2-2.5 hours during the day. About night, I can say nothing, we sleep well, but during the day, the dreams have become 20/30/40 minutes long and it doesn't work out. ? We keep time, the child doesn't oversleep... and eternal tantrums, dancing with a tambourine is no longer helping. Have you encountered something similar? What could be the cause?