I think my mom has PTSD

My mom had a tough day, as she got in the middle of a fight between 2 of her sisters.

When she came home to talk to me about it, I mentioned that one of the two has some autistic like qualities and has been like that since she was born, and somehow, that let my mom to start talking about losing her first child, the one she had before Mike and I.

Which got me thinking she might have PTSD because she talked about it not like a memory, but like she was reliving it as she spoke.

I got her to do a grounding technique with me, and she calmed down, so that's good, but I'm now a little concerned.