Baby sleeping

Maria

So my 2 month old almost 3 month old has been sleeping through the night I do changer her diaper , she sleeps from 11pm until 7am sometimes earlier or later depending what time she goes to bed ! She’s eating 4 oz every 3 hours she wakes up eats and goes back to sleep will wake up about 11am or 12pm , is she sleeping to much or is this okay ? Sometimes I get worried first time mom here don’t judge .