Everything keeps changing!

I feel like as soon as i get my baby's "routine" down, it all changes! Its maddening. Im a pretty go with the flow kind of person, but this is really hard guys!

Side question- what time does your baby go to bed? Some days i think she needs to go to bed earlier like around 730 cause she gets super cranky, but then other days i try and put her down before 8 and shes too energetic, just wants to play. Should i be sticking with a set time every night no matter what? Cause it seems like very couple days she needs a different time.