my child is 3 and half months old. she is not drink breast milk at night time from 4 days, she is continuously sleeping up to 5 to 6 hours,is it any problems for my child

A. There is no problem with the child that is a a schedule change which is normal for kids a lot of time you would see from an early age there would be certain amount of time at a child take a nap for a long stretch and with growing age it becomes more which is normal and good for their total mental and physical growth