wee wee refusal

hi
I'm in a dilemma.
My 2.5 year old has been toilet trained for about 5 or 6 months now.
Once upon a time she used to tell me if she wanted to wee wee.
I got into habit of taking her regularly because my Bil's kids were living with us while he was in hospital and she often got
busy playing and distracted. So accidents never happened.

Now... if I don't take her she wont ask to go. And now ... even if she's busting and I ask her.... she says no.
then she has accidents.

so far there hasn't been any poo accidents. she ALWAYS tells me if she wants to go poo. it's the wee.
its like a HUGE thing for her to go. sometimes I have to threaten her or bribe her for her to go and its wearing me out.
I'm due to have a baby in about 6 weeks and will have 3 under 3. just as a side note I know for a fact its not the coming of this baby.

what happened and how do I fix it?

Any feedback would be highly appreciated

Thank you very much in advance

This happens every now and then.

It's frustrating. I just take DS2 to the toilet and pop him on when he's going through a stage like this. And, 9 times out of 10 he goes.

I think they just need a "refresher course" every now and then.

This morning I was completely cross with him because he'd done a poo in his night pants and decided to use it as paint. He knows where poo goes and I have no idea why he did it. We'll just move on and start again.

We're experiencing very similar with 2.5 yo. I think the novelty has worn off and she's a bit disinterested in disturbing her play. Reminders and physical placement on the loo are tiring when you know they've already learnt how. Persist in reminding her and normalising it. Can you put some fun books etc near the toilet for her to read? Or ask her to count how long it takes and tell you on her return. I also have 3 different seat/props/stools she can choose from each time.
Lots of encouraging praise when she does go to the toilet either prompted or not. While its still warm I also offer grass wees in the garden as an alternative.

My DD1 is doing this too. She is 2y7mo, and has been accident free since at least 2 (? even earlier - we had been doing EC).
I have been trying to suggest that it's toilet time, rather than ask her, because the answer is always no, but still she is absolutely refusing to wee! She will stand there, holding her fanny, and hopping from foot to foot, and still says she doesn't need to go, only to have an accident. She has been having accidents quite a bit over the last 2 months or so, whereas prior to that we had been fine. ??????????????????