9 week old sleep-help!

hello! I am desperately hoping that my baby girls nightime sleep starts to get better soon. On a good night she gives me two 2 hour stretches in a row after that she is up every hour. We have a nighttime routine (bath if it's bath night, pjs, nurse in bed and shh pat/cuddle to sleep). She is ebf, swaddled and we have white noise playing she also refuses a pacifier. Any suggestions??? At this point I would be thrilled with every two hours, the one hour stretches are killing me!