Hang in there Heaven - you are trying to change the world as she knows it. It will take small steps, a good friend told me she found it took 3/4 days to get changes with sleep implemented and you have to ride through it.
I have always found day 2 of any change the tricky bit - as bubs realises the change you made on the first is not just an accident IYKWIM.
Anna has given you some great suggestions - but please be kind to yourselves, it will get better in a few days. She will be feeling your stress too.

Sending you heaps of sleep vibes - perhaps go and reaffirm/refresh yourself with your plan. xxx