Erratic sleep patterns for 7 week old baby?

Babies won't develop regular sleep patterns until about 4 months--that's when they will be ready to sleep through the night, regardless of what they were doing before. Your baby sounds like a normal newborn. She's in the 6-8 week stage where fussiness peaks and she starts to become social. Her sleep patterns are normal. Just hang in there. She will probably be sleeping more at night as she gets a few weeks older and by months 3-4 she will be ready for sleep training and will learn to sleep through the night.