My DD1's best friend has Down's Syndrome. She's 7. They are quite evenly matched in terms of how verbal they are, their physical abilities, and cognitively.
They can be quite naughty together. It's was a delight to see the shocked faces of people when they happen to meet in the Doctor's Surgery, because their eyes met, and they called each other's names as if they hadn't seen each other for a year, as they rushed over to each other to give the warmest hugs.
They both go to Special School. My DD had always gone there, but her friend started at Mainstream first, before realising that Special School would give her the best education for her needs.
The reason I'm posting this, is to say that my DD, who is really just like the girl I know with Down's Syndrome, wasn't diagnosed with SN officially until she was 2 years 9 months old. There were signs for me, as a parent, but I was a first time mum, and was told I was neurotic. DD1's friend was diagnosed at birth (not before).
It feels a bit clumsy to say it like this, but I guess what I'm saying is, I didn't get the 'chance' to terminate DD1's pregnancy. I can't tell you for certain what I would have done (although, admittedly, I refused the triple test because I wouldn't have an amnio, and nuchal wasn't available then anyway), but I am so glad I didn't have that option.
You are right. Life with a child with SN isn't as simple as I had hoped life would be. I have faced challenges that were unexpected. I, too, am a Christian, and I always thought that I'd be someone who would help families with difficult circumstances; it's been a big adjustment to accept that it is my family who needs that help right now.
Having said all that, I believe my children are richer for having DD1 in their life. They are now almost 7 (DD1), 5 and 3½. The hardest thing for her sisters, is trying to understand 'why DD1 has a hard brain' and 'why can't DD1 hop'. But, already, they have learned tact beyond their years, because I am constantly having to stop them from pointing out that DD1 hasn't said something correctly, etc.
If you met DD1, she'd make you laugh so hard. She struggles with many areas of life. But she has so much self-confidence, and humour, and has absolutely no social inhibitions. In fact, if everyone in Britain was like her, we'd have all the leaders of the world packed into one country.
I do hope you find peace with your decision. A decision only you can make. As a fellow Christian, can I suggest that you take a few minutes to just sit. Try and relax. Deep down, do you want to finish this now? Do you want to terminate? Or are you scared of continuing in case you get it wrong? I hope, whatever the result, you'll find peace in your decision, because whatever you do, your life has changed.
Take care x