VL,
I lost a daughter, 19 yrs ago to a stillbirth at 9 months. It IS a devastating loss and I am SO sorry that you are having to go through this. It is a very unique kind of pain and a very real and legitimate loss.
I hope you will find a bereavement support group for parents - either in person or online, and let yourself feel what you need to feel. Above all else, be gentle with yourself and I encourage you to find ways to honor your baby - plant a tree, release balloons or make a donation to Ronald McDonald House and things such as this that are done in your baby's honor.
Big hugs to you
A