Name changed just for you op.
Don't do it.
I decided to "start again" with a 14 year age gap and as much as I love my youngest I wish I hadn't had another.
I got no evening last night as he was fussing and whining and refusing to go to sleep, and he woke me up fussing and whining at 5am because his duvet didn't feel right. 😢😱😭 He's 7. 🤦
He was a fussy baby who barely slept, and I really "felt it" much more than I did with my older ones.
I have been more chilled this time round in terms of knowing how it quick it goes. But I'm tired, my body is fucked (didn't bounce back anywhere like after my older kids), and my finances also went down the pan.
Oh and dad decided actually he didn't fancy doing it all over again after all and fucked off. Which might not happen to you, but it's another thing realistically to weigh up. That something might happen that means you are doing it solo.
If you feel wistful like you still have love to pour into something/someone I recommend a cat or dog, or you could even do respite fostering or a volunteering role.
I know I'm being negative but it's such a taboo topic to say you regret having a child. I love my youngest just as much as my other dcs but he has a different mum to the one my older ones got, and it's definitely a decision I made with a romantic optimism of how it would be rather than weighing it up from the flip side of what the negatives would be.
Also, don't underestimate how much your big ones still need you. It's a different kind of need but it's there, and I also feel a lot of guilt that my older ones don't have my energy and attention as much as they would have had.