S.M.
I worked with a lady whose brother lost their baby girl to a Congenital Heart Defect. They did have a heathy baby girl a couple years later. They have opened a foundation in their daughter's memory in Houston. The website is Bigheartfoundation.org. Maybe you can find some support or more information through the website.
God bless you! I wish you the best. We lost our first baby 11 years ago to a very rare metabolic disease and were fortunate enough to have a healthy baby boy a little over a year later.