Congratulations!!! you were selected to be a mom to such a special child!! Just like you I was fortunate enough to received such a gift! Mine unlike yours hid her secret from all of us so when she arrived she was quite a surprised!! Since the day she was born she blessed all of our lives! Will never change it for the world.
How will your life change? Well first and foremost they are babies just like the rest of them, they will need your love, support and to be kept safe, like yours mine had a heart defect, I am not sure what type of defect yours has but mine had a little hole in her heart that should have closed after birth but did not...so after 5 months she went thru surgery ( not open heart) technology nowadays is so great that they plugged her little hole with only 2 small incisions, then of course you will be going to more doctor's appoints on her/his first year to make sure everything is working as it should after a year or so mine only went to her regular shots and doctor's appoint and she is now 8 years old and just like any normal child just goes for her yearly check ups.
She does needs speech therapy and supervision because she is still small 8 years old but just like any child you would look after.
I remember when my Lily was born, for some reason strangers that came to visit other babies were always drawn to her and they had no idea why, they would come up to her little bassinet in the hospital and say things like what a special child ( they had no clue she had downs) it was just a special spirit for sure.
You will worry, you will cry, you will laugh, you will learn to see your child just like any other except she does her things a little slower than others, it is not easy but I swear to you is sooo worth it!
non Supportive Husband : I am sorry for this and I am even sorry for his suggestion, I don't know your hubby but I wonder if once baby is here he will fall in love with it? or would he leave you? I wish you the first but again I don't know him.
Should you terminate : What a decision you have ahead of you, I of course can't tell you what to do, all I can tell you is my experience...but I can tell you, you have choices you could carry the pregnancy out and give up the child for adoption here in America we have a year long waiting list for parents hoping to adopt a child with down syndrome so you could bless somebody else dreams of having a special angel in their family.
90% of women given a positive amniotic test for downs choose to terminate, that breaks my heart but of course it is their own choice.
There are tons of support out there, I can talk to you about how wonderful it is to have such a child but at the end of the day the decision is yours my friend and it is such a heavy one when you feel alone and unsupported by your OH.
I am here for you if you have any questions, my best wishes to you and your precious cargo!
Here is one of my favorite photos of my little lily
https://imgs.inkfrog.com/pix/toysofmylife/n1402458970_30093689_6757.jpg