My dd who is just about 10 months always goes to sleep about 15-20 minutes after i put her down, the last week she won't go to sleep for almost 2 hours!! and she is not crying just wants to play and crawl/walk around her crib, yes she is going through another new transition, she is starting to walk, is this why she is doing this? Its upsetting me more than her, but then she falls behind on sleep. any suggestions or is this something totally normal? thanks for your help :?