Natalia,
I doubt you are doing anything wrong at all. Your lo is still adjusting to being outside the womb, and doesn't "know" what she is supposed to be doing
I wouldn't worry about it too much, especially if she is easy to put down at night after a feed. Keep up your hard work and as she gets older things will probably fall into place more and more easily. It wasn't till my dd was about 8 weeks that we really had a predictable routine going. You're doing a great job, don't doubt yourself! You're giving your sweet baby predictability and comfort by working on a good routine, and you should be proud you're doing so well already with such a young baby! Good luck, and keep posting, this is a fabulous web site with some wonderful people with great experience!