Suggest Remedy For Periods That Does Not Stop

i have been concerned with my body lately. I have people telling me that I'm a little more moody than usual but, my biggest concern is that I have had my period for almost 4 weeks. It won't stop! My boyfriend and I were having sex but I thought maybe I was bleeding from that. We haven't had sex since and that was last week. Since we stopped having sex I feel a burning and itching feeling that comes and goes through out my day... Should I also be concerned that my breast seem to be noticeably larger?