When my LO got to about 7 weeks she got really good at night time would go sleep between 10 and 11 and would wake between 3 and 4 and would go straight back to sleep with no fuss, it was bliss But these past few nights shes totaly changed, shes going sleep later, waking up quicker and taking some work to get her back to sleep. i thought their sleep routine was ment to get better between 3 and 4 months lol ? Shes just turned 3 months old and iv never felt so exhausted in the mornings. Is there ment to be some point where they do this ? go out of their routine for abit ??