Hi there my baby is 7 weeks old she is fine during the day sleeps eats very good but at nite between 8-11 pm she is very restless is there any reason?

Nothing important : Brazelton and other researchers examined unexplained fussiness in infants, finding that it peaks around 6-7 wks & usually declines on it's own by 3 mo. Researchers label it colic if it happens 3 hrs/day at least 3 days a week. Unless their is something else going on I would consider this as part of your introduction to parenthood.