Pisted off !

My son is 10 months old 10!!! d he’s visiting with his grandmother she calls an hour after the incident to tell us our son swallowed a 10mg melatonin, now I’m freaking out. I’ve tried to not call an cuss every adult out in her house, accidents do happen but too wait an hour to Inform the parents is ludicrous, do I need to take my son? We are in route to pick him up 🤦🏻‍♀️

Edit too add:// I been called poison control they just said too push fluids he’ll sleep it off...I’m wanting to take him in too ease my nerves.