Having watched my parents lose a child, the most private people I know (not outwardly social), even they needed a support group and my dad went to counseling after my sister passed.
They tried it on their own, but it was so bad, so much worse than they imagined that at one point my mom actually had to insist that my dad went to counseling. He blamed himself for 'allowing' her to have a surgery at one hospital where it all went wrong. It's hard on the individuals and hard on the marriage.
Please take care of yourself. It is horrible and the most difficult thing a parent could ever go through. Time doesn't take away the feelings, but according to my mom you learn to manage and to sort of make the feelings part of your day to day existance. And, they won't be as raw feeling in the future. You'll be able to manage and will be able to enjoy living again.