"@WeDidntMeanToGoToSea The thing is, OP, all the people encouraging you to keep the baby aren't going to pay your bills, or look after your children while you work long hours to keep a roof over your heads, or clean your house so you can spend what little time you have with your existing children. It really does sound to me as if the impact on your existing family would be too great. FWIW, I have three children and would likely terminate a pregnancy with a fourth, although I am with their father, we both earn decent money in professional jobs and mine is flexible and from home.
Nobody likes the idea of a termination. It's a hard thing to do. I'm just not sure your entirely understandable sense of wanting to keep the baby and make it work outweighs the very real impacts on your existing family.
The choice - obviously - is yours. But if I were you? I would absolutely terminate."
I agree with this poster. If you can comfortably afford and house a fourth child by your own means, can continue to work and support yourself and your growing family then that is your decision. I have 2 DC, work full time , am a single parent ( divorced) and own my own home , i could never afford a 3rd or 4th child. Being honest, my children would not be happy with any additional siblings , fathered by another , either.
Expanding your family, if you can independently afford it and, your existing children are happy, is your family choice.
With kindness, you have stated that "(I have 2 different dads already, this pregnancy is with a different man) but I don’t think it will br catastrophically awful as those around me make out". I suspect those who know you are giving you sage advice.
With respect Op, 4 children with 3 different Dads would not be something i would either wish for myself or my children . I personally would focus on the opportunities and life experiences you can afford and extend to your existing children , on your current income.