What poor care does on top of the loss
One study, and it is here because it names something people rarely say. How the loss was handled by the people around you, in the hospital and afterwards, is not a footnote to the grief. It is part of what determines how heavy the grief becomes.
If you came out of this feeling that you were badly treated, or dismissed, or moved through a corridor at speed, that is a real second injury and it is documented. It is not you being ungrateful about people who were busy.
What the research says
Heazell AEP, Siassakos D, Blencowe H, and others (2016). Stillbirths: economic and psychosocial consequences. The Lancet, 387(10018), 604 to 616 doi
Documents the psychological consequences for parents after stillbirth, and the role that stigma and poor interactions with care providers play in making those consequences worse.