Tell me your stories successful or otherwise! We did Ferber with D at 4.5 months with great results. E is about to be 4 months and up until a week ago was having some nice sleep for naps and nighttime. Not sure of this is a regression, teething or what. Should we wait it out? D never regressed at 4 months because his sleep was just so awful all along. It made it easy to know we had to do something... With E I'm not as sure