Its sore down there???? ladies only?

I fingered myself a few days ago and it hurt at first and well it wasnt as few days ago its was like 2 weeks ago? well i fingered myself and when i fingered my self again yesterday it hurt more than it did the first time? What happened? Did i cut my self with my fingernail? I have long fingernails.Not not 3 inches like but like 1 centimeter long on the tips