DD2 was like this until about 8 weeks and she was on time. I would put her in her cradle and she would sleep for 5 minutes and then scream. She would sleep for 2 hours in a sling! After 8 weeks she started going longer and longer in the cradle so I kept persisting. 10min in the cradle then in the sling etc - now she does all sleeps in the cradle.

Your little one was so small that she may do this for longer but try to do it gradually - she is still just getting used to being out in the big wide world. It can be a scary place for the little ones.