Hi Shilpi may be because of the weather, feed her every 2 hours in sleep. Everything will become normal soon.

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First of all congratulations dear., And welcome to baby chakra .. it's normal baby to sleep lot, only for feed they wake up, it's important to feed the baby every 2 hours once, allow baby to sleep, once she wakes feed her, burp and put back to sleep, Baby does not know the day and night.. so they wake up any time, from 5+ months they will sleep properly... it's all the new phase for you, you can get thought it, drink more water, follow healthy diet, rest along with baby, so you don't feel tried at night... you can dream feed (feed while baby sleeping, they just latch and drink in sleep) the baby..if baby don't wake up for 2 hours..! Read this articles hope it helps you...