Baby sucked on ice melt

Feeling so bad. My husband put ice melt (salt stuff to melt the ice) on our porch and later grabbed a package and a piece either stuck to the package or his shoe and ended up on the rug. My baby put it in his mouth. I was sitting right by him, I looked down to put his toys in the bin then notice he was making a funny face. I then checked this mouth and found a tiny piece. Called his doctor's office and poison control and he's fine. But feeling like a crappy mom and needed to vent. 💔 😭