Baby blessing

My sister in law is doing their baby blessing at their church September 22nd. I don’t know if I want to go. My sister in law didn’t do anything wrong. I am still having a hard time with the loss of our baby. So my mother in law wrote me asking me if her son who is my husband got the text about the baby blessing. I wrote her this: I’m in the blue she’s in the white. The reason why I don’t want to go is his family isn’t very understanding about what I’m going through. My family is because we have four angel babies in heaven. Two from me two from my brother’s wife. Am I wrong for how I feel? And if she ask me why I don’t want to go what should I say ladies say?