I inserted three fingerd deep and i think i hurt myself with my nail because there was a little bit blood, how fast should i see a doctor?

Where did you insert: Where did you insert your finger to draw blood? What symptoms or problems are you having that prompted you to try and either feel for something or want to extract it? If the bleeding is minor and has stopped then, it is unlikely that an emergency exists. If the bleeding is not stopping then, you'd be well advised to see a doctor sooner rather than llater.