my baby is 2 months now. he only sleeps around 3-4 hours in a day and 4-5 at night. is it normal. I am worried that how he suddenly changed his routine. earlier he used to sleep much more than this. now he does not sleep at all

A. Sleep Cycle in smaller babies is vejfdry different and they have a certain pattern initially which becomes regularize at around 6 to 8 months of age and if the baby is comfortable with no irritability because of infantile colic nasal blockage any regurgitation etc you should not worry just give a comfortable position to the baby and no medicine is required.