I got a nasty cold awhile back and immediately after, I got a hard spot on the floor of my right nostril. At first i thought it was a scab so picked it, but it wasn't red and didn't bleed after picking it. It is not boogers, though, as it is attached to -and seems apart of- my skin and hurts even when I move or itch my nose a little. What in the world is this and how can I make it go away?