Helpp 😩

sa

My 6 week old cries every single night for the past week at exactly 10 when we're ready to go to bed she decides she doesn't want too and cries for hours until I pick her up and rock her in my arms..I know she's not hungry because I always feed her beforehand and change diapers...she just made it a routine to cry uncontrollably for no reason 😭..

What should i do to get her out of this bad habit 😩..me and my hubby already tried letting her cry until she falls asleep but it just doesn't happen 😖