my son is almost 5 months. we've never had any issues eating, now the last 3 days during the day if…

my son is almost 5 months. we've never had any issues eating, now the last 3 days during the day if I try to hold him to eat from the boob he refuses. I literally have to take him into our bed and lay him down to eat after that no fuss at all and he chows down. anybody experienced similar situations.