Thanks for all the views it's helpful. I'm surprised that most are saying go for it I thought it would be the opposite!
I've been doing some thinking and visualising the future eg in ten years time if we went for it and if we didn't
So I have... in 11 years time taking dc1 to look at universities with a 9 year old
Dc1 leaving home at 18 and having a 10/11 year old still at home
Dh and I being 63 with a 20 year old and a 27 year old
It's all a bit scary but I can still imagine it IYSWIM
I've also looked at why I want another child:-
It's a gut feeling I can't describe
I don't feel like we are done
We have love to give and dc1 would be a great elder sibling and it could bring out even life good qualities in him
Financially we are ok
Then there are the " known" issues
It will be hard
It will be challenging with a big age gap
It will affect our couple time and me time which we have got used to with dc1 being older
We have had 7 years of dc1 being an only and it will affect dc1
We will have less/ no support from our own aging parents
We have no other family to help
Then the Unknown's but increased risks:-
I will likely miscarry again which will be upsetting and at worst a late miscarriage/ still birth / ectopic
We may end up with a disabled child
We may end up with multiples
So again on paper it's a definite no
It's hard to hear though!