Hello. My DD2 is only 9 weeks but wondering if I should start moving away from her napping in her sling? She is becoming more and more aware and therefore it's becoming more difficult to get her to sleep. She does tend to fall asleep at boob if not overtired however then only sleeps for 25 mins at most if I put her down. How do i then get her to sleep longer? We have tried white noise/something that smells of me (but not very consistently). In the sling she naps for 2hrs three times a day then doses on and off at boob in evening until we go to bed at 10pm. We co sleep, she tends to cluster feed from 04:30 
but sleeps the first part of the night ok! Thank you 