Does Masturbation cause devirginization?

Laugh all you can. But I made this account just so I could ask this. It really bothers me :'( I'm 17 years old, female. I am fond of watching , but not the type that would do that everyday. Okay so here. One time, I had ographic thoughts, and tried to masturbate. I don't use vibrators or anything, just tried to play with my and inserted a finger on my back and forth, but it took only seconds. Usually, i play the "bag" inside. i don't know what that is. Anyway, Then I saw blood on my nail. But i didn't feel any pain at all. Like, 3 years ago i guess, this also happened, But no pain. What does this mean? :( Please, I just need help. I don't have anyone to talk to. Thank you very much to any one who could help me..