Please help! My newborn is 3 weeks 2 days and..:

She has been awake since 1pm today and it is now 10pm. She will fall asleep only to wake 2-5 mins later. What is going on? I've tried laying her down, put her in her mamaroo, took her for a car ride... I've spent at least 5 hours in the rocker and my body is so sore from rocking ...