Baby is 4days old and cries for hours at night

Ladies any advice would be greatly appreciated since I feel so helpless and it's making me depressed. My baby girl is 4 days old and last night she woke up at 1:30 AM and would not stop crying until 7AM . I fed her and changed her and rocked her and did everything possible and she would not stop ! She burps after she eats and goes potty regularly. Am I doing something wrong? Is this normal ? Does it end ? This is the second time since she got home that we have gone through this. All I want to do is cry