29 month old DT is breaking me. Need help with sleep/wake cycle please

[Floellabenjamin]

DT is over 2.5yr and over the last 6 months has taken to waking at exactly 12.30 am and then 5.30 am almost on the dot. She wakes asking to go for a wee and then will settle immediately at the first one after I take her to he loo and won't at the 530am and ends up waking other DT who would sleep til 8am and DD who also is an excellent sleeper.
I have cut back fluids - she has a sensitive bladder but I don't think it is needing th loo. I can see she is tired she just struggles to get herself back to sleep- I have seen her fighting it and trying to keep her eyes open. I can't separate them- no room and they would get too upset, they love having a chat at night together and have always shared the same room.
This is breaking me, I've had a dreadful year emotionally and I work FT. So I end up looking after them for 4 hours before a 10 hour day at work and I am exhausted.
My Dh so of no help, he doesn't hear them and if he goes in they scream like mad. He has to leave for work at 7
Would anyone have any suggestions at all please?
Thanks for reading

Sorry for the dreadful typos on iPhone

It sounds very much like my dd. but she does have periods where she can sleep well.

Does your dt ever, or has she ever slept ok?

Yes she has slept well before, this is a recent issue over the last few months. In 2 weeks I would say she would do a whole night once- missing the 12.30 wake up.

It's so hard isn't it. I would suggest a gro clock, things near her to amuse herself with quietly if she wakes early and can't get back to sleep and rewards for if/when she manages it.

Other than that you just need to maximise your rest time so lie on the sofa with a duvet whilst they play before you need to get up.

Not masses of help, but you have my huge sympathies because being constantly exhausted and unable to work properly is utter shite.

X x

Is something waking her up? Just wondering why she's waking at those times on the dot. I would set up a bed in her room so you can sleep in there and see what it is (if anything). Is she on one side of the room e.g. by an external wall or window? Is there a light that is shining in? Is she teething?