Clogged pore?

My pubes are just starting to grow back after shaving. I just noticed a black dot where the hair is growing in. I had no idea what it was, but I went ahead and pinched it between my thumb nails to see if it would come out, and sure enough, it did. The black dot came out with what I can only describe as a long, solid filament behind it. Do you think it was just a clogged pore? A weird ingrown hair?