Fio - whilst we did not have a lot of the worries that other parents of children with sn have - we were a little concerned especially when dd2's 20 week scan showed a soft marker for down syndrome in her heart. Although for us there seem to be an unspoken agreement that we would have more children.
Having dd2 ( who is NT) has been like being new parents - dd1's care was just so far removed form the norm in some ways that we did not know what hit is with dd2 - sleep deprivation, feeding on demand and so on. It is amazing to see the interaction between the two girls. I find it amazing watching dd2 develop compared with dd1 - each suprises us but it just amazes me how easy things seem to come to dd2.
Can understand how you would be petrified. I found it difficult being pregnant with dd2 from a testing etc point of view - as I already had dd1 - every bloody medical professional ( except for my fab GP) wanted to test the living daylights out of me and got most annoyed when I said no. Finally was referred to a good obstetrician who also agreed to my decision of minimal testing. It made me angry that people would automatically assume - being over the magic 35 ( that it is here) and already having had a child with down syndrome and a heart defect that I would want every test going.
I can still remember dh and I looking at dd2 in the recovery ward after she was born very closely to see if she had any physical markers of ds given that there was an elevated risk of subsequent children having ds added to the soft marker they found.
It is hard work having the two - and dd1's needs are nowhere near as great as some children with sn - am sure that makes a huge difference. I feel a little guilty that dd2 is dragged everywhere - hospital appts, playgroup, therapy etc - especially when I hear mothers going on about their babies routine and I think poor dd2 doesn't have one - very quickly she learnt to nap in the car and so on. Mind you I also hope that exposing her to children with a variety of sn will help to make her a more empathic, compassionate, thoughtful etc young lady.
having said all that - I look at dd2 and want another and dh has said no - he is too old for all this sleep deprivation, worry and so on.
sorry for the ramble - probably no help at all.