Hey Jen, if everyone else thinks you should have one, then you probably don't need it at all. Having a routine wont help her sleep through the night - some babies just don't sleep through the nght at all until they are a lot older and some will do it quite early - the golden rule in parenting should be that your baby will sleep through the night when they are good and ready to LOL. Aside from what other people want you to do, are you happy with things as they are? If so then I would just keep doing what you are doing.