If this is done with the first 4 weeks of pregnancy (ie before your period is 2 weeks late) the bleeding you have will not be drastically different to a normal period. It will probably be a little heavier, clottier and more painful than usual. I do not recommend doing this if your pregnancy is any more advanced than this.
If you bleed very heavily or are in a lot of pain then you should seek medical attention immediately. You need to be honest about what you have taken so that the doctors can help you.
Emotionally you could feel anything from relief to sadness to guilt. These feelings are normal and, if you feel the need, you must allow yourself to grieve. If at all possible I suggest you tell another supportive person what you are doing so they can be there for you.
