Hii Rajshree... It's normal for small babies... They don't know the difference between day and night...And also their sleeping pattern keeps changing... Keep the lights dim and make the surrounding calm and silent... During day time let the light come... Keep the curtains open...And also don't forget to burp the baby well after feeds... <br> Don't worry this will be fine soon... We too have faced this...Baby will start to develop a routine till he is 5-6 months old.