What Causes Scanty And Painful Menstrual Periods?

OK, my husband and I have been trying to have a child together for about four years now. I have been having some problems. For about five years, every time I have my period, my cramps are almost as bad as contractions (no I'm not stretching it, they are that bad) and I don't bleed like I should be. I clot more than anything and it is more frequent that it used to be. Can you tell me what it might be, I have been waiting to get ins so I can go to the Dr.