This morning I discovered what looks like some kind of nest, 3-4 inches long, growing along the top of a window inside my house. I've seen a couple of very tiny black spiders nearby, so I suspect it's a spider's nest. I'm hoping to nail down exactly what it is so I can figure out whether it's safe for me to remove myself, or whether I should get a professional. Apologies for the fuzzy picture, it's hard for me to get a good one with the lighting.