sometimes babies can get really exhausted after a trip and even though we feel that it's been time and baby must be well-rested, they need more time to get their energy level back.
if your baby is only asking for your milk, let him have it. also, let your baby rest as much as he wants to.
don't worry as this is normal, and both my babies have also behaved like this. in fact, my babies used to sleep for almost 14 to 16 hours at a stretch for about 4 5 days after we came home from a trip. so don't worry. any change in daily routine is difficult for babies to handle initially, so just give some more time :)
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