Suggest Remedy For Heavy Flow And Longer Periods After Childbirth

I got my period when I was 12 1/2. It was normal flow, albeit never 28 day cycle for 4-5 days until after the birth (and stress of health issues) of my now 6 year old daughter that it became strange. I get almost no warning to when I will get it. I rarely experience cramps or any kind of pain at all before. Lately, it has been SUPER heavy, where I have to wear at least 2 overnight pads to keep it in "check". My cycle is also longer than it used to be, and I sometimes will skip a month (especially if I get it toward the end of one month). Should I be taking something? If I get pregnant again, will they slow down?