Oh for goodness sake @Justellingthetruth stop hijacking this thread. You sound like an ideological teenager with climate angst - even Greta Thunberg hopes to have kids one day (as mentioned on the How to Fail podcast).
Go and make yourself a cup of tea and watch a few Hans Rosling videos on population growth. That might calm you down.
@heartbroken22 sorry your thread has been hijacked. How are you feeling about things? How far along are you?
I mentioned upthread I'm 12 weeks with my third (scan next Tuesday), I feel like as I progress I'm getting a tiny bit more excited and bit less dread about it all, but I have definitely searched old mumsnet posts and YouTube about looking after three and what to expect.
I think the slight fear (for me anyway) is that I don't know anyone else with three or is expecting a third, so it feels like quite a leap to deviate from the norm of one or two kids.
If your eldest is at school, will much of the weekdays feel like when you had two before? Except this time with drop off and pick up squeezed in?
In some ways I'm hoping it might be easier with the elder two being able to play together while I feed etc.
Anyway, I hope you're feeling better about things - it's been reassuring that I'm not the only one that's had a bit of worry about having a third. I think it's probably quite normal!