I hate to hear you are going through a really rough patch right now. I know how one stressful thing can lead to another can lead to making bad decisions that ultimately hurt myself. It all kind of feeds upon itself in a vicious cycle. Do you know what triggered all of this in the first place? Depending upon where the cuts are and how bad I'd say it's likely you will not have to tell anyone anything. The most important thing right now I'd say is to patch yourself up physically then see to the emotional side of things. How has the week been for you?
"Life is like this dark tunnel. You may not always see the light at the end of the tunnel, but if you keep moving, you will come to a better place." ~ General Iroh