She's at a hospital. You think the IG post stopped her from getting help? That it took that much time to take a picture and vent for a minute? You can do both.
I don't know her at all and won't pretend to. Her trying to commit suicide because of her IG account (your theory) sounds like a pretty big deal to me. Shows that she clearly needs help. Don't see how that makes it any less valid than anyone else attempting suicide.