Drawing a blank

So all day today I have been dealing with PTSD from 2018 when I lost my girls. I have just been relieving that experience over and over all day. My husbands brother lost his kid yesterday and told us this morning and I was immediately back to that day I was immediately back to holding my babys. He sent my husband a picture and my heart rate was skyrocketing I started shaking. I keep trying to tell myself this is not about me. This is his loss mine was a million years ago so I haven't let the tears fall but I know how that feels I just want to hug them I don't want them to feel the pain and I don't know what to do. I am sending memes and jokes, I am trying to offer food or something anything to take the pain away. I don't know what to do. I want to do something but I don't even know where to start I don't want to seem annoying but I really just don't know what to do. When my girls died I made jokes and hid behind my humor so idk what he would need he won't tell us what he wants to happen dose he want to fight someone dose he want to yell drink? Or maybe he wants to laugh. Dose he want people to act normal around him I just don't know what to do for him. Someone tell me what to do I just don't want him to feel this pain anymore I wanna take it away or make it easier somehow.