They usually clot and form a scab. I would just put some new gauze on and tape and hold it for 10 minutes. It is strange that it went all day and still pulled a clot. I'm sure you will be awake all night checking it or at least I would. But, just check it and if no scab forms then you need to call. Or go to ER and they may have to put a stitch in it. I have heard of that before although never done to me.
Sorry this happened to you late at night.