Mam you have not mentioned your child age in months. This is common after initial few months. All normal Babies have some crying time in a day. Babies start distracted and feed less in day time. Nothing to intervene if your baby is gaining weight normally, passing urine atleast 6 to 8 times in 24 hours, sleeping for 8 to 10 hours in 24 hours.
Start complementary feeding once your baby finished 6 months.
Next Steps
consult a pediatrician if you are not monitoring your baby's weight gain/ less urine output/ not sure of complementary feeding/ incessant cry (crying continuously irritably/not consolable )