I was trying to secure some bookshelves to the wall, and after using a stud finder to confirm it was drywall (and not a stud), I drilled into the drywall. I met some resistance, so, like an idiot, I switched to a wood screw and just drilled into what was there. I removed the screw and noticed that some black plastic was stuck in the threads of the screw; meaning I had likely screwed into a pipe.
The spot I drilled through is right in the center of a very large wall, so I didn't think it would be likely that the builders would place a pipe there. However, the house is 2 stories and there is a bathroom above the wall I drilled through.
There's no water spilling out yet so perhaps it is a drainage pipe?
All that said, am I screwed? What should I do to confirm that I did or did not hit a pipe? What's the best way to go about fixing this?