The water wasn't draining properly in the bathtub so my sister used some Drano crystals to unclog the pipe a few minutes ago. After pouring some water down the drain, some metal shavings/fragments came up and we got some fumes coming up now. I turned the fan on, opened the window, and shut the bathroom door but we can still kinda smell it. I've even opened the window in this room and the one in the kitchen but I'm not sure if I should do anything else. Worst case scenario, what should I do?

Not sure if this is the right place to post this.