Who knows what can be ? We almost adhered to the regime from birth, t…

Who knows what can be ? We almost adhered to the regime from birth, the baby didn't fuss, ate and slept, during wakefulness it behaves actively, then falls asleep soundly, sleep in average 3-4 hours, for the last three days started sleeping by day for 5 minutes, at night I can't put her down, if earlier they were putting down at 9-10 hours, then now until one o'clock in the morning may not sleep. At the same time she doesn't cry, just lies and doesn't sleep ??‍♀️ eats normally, we on Gv, regurgitates still a lot ? But this is because she pulls her legs a lot after eating