I don't know what to do. I closed the bathroom sink plunger for my first
time ever, to wash a shirt, and now pushing or pulling the handle doesn't
open it! It's like it's not even connected anymore. The sink is old. The
water will not drain, except through the emergency drain hole at the top of
the sink. And when I use the sink, it overflows, since that hole is too
small to drain. I now have a fruit fly infestation.

I don't want to have to contact the landlord to fix this for various
reasons. She wouldn't be able to fix it for a few weeks anyway. The water in
the sink is disgusting. I don't want to have to open the sink from the
bottom pipes either. Is there any way to manually force the plunger open so
the sink drains again? I tried a kitchen knife, but it wouldn't fit. I need
something strong, yet thin, to fit in.

Thanks!