Oh, I'm sorry your feeling this way Mandee, but this means though you may have done something wrong you probably don't act this way very often because it makes you feel bad... And that says slot about you that is good. Though it may be hard the best thing to do is make up for your error by apologizing or doing what you should to fix it .
If you have feelings of guilt in your chest, then you should try changing any distractive patterns in your life. Try to make amends where you can so that these feelings of guilt can be replaced with a sense of relief. Consider having a professional counselor help you recover from guilt faster. Find more tips from http://www.wisegeek.org/how-can-i-stop-feeling-guilty-about-everything.htm.