Why Am I Having Unusual Cramping And Heavy Clotting?

After my last 2 kids that is what happened to me. And apparently it can happen. It isn't considered normal. Go to your ob/gyn and ask for options. There are several. Going on the mini pill; a new IUD called Mirena is really excellent at helping this; they can do a kind of scraping/cauterizing of your uterus that helps some women. I went through HELL like that for almost 2 years and it kept getting worse. I kept thinking it would get better and that it couldn't get worse--and it would get worse. I wouldn't be able to leave my house for 2-3 days a month it was so bad. The cramps would get so bad I would feel nauseated. And the clots were beyond anything anyone should have to deal with.It was horrible. So I know what you are going through. And it only happened after the kids were born. I was fine before that.
I finally got the Mirena IUD and it literally changed my life. The cramping is tolerable, the clotting is gone and I barely have a period at all anymore. It is amazing. I have not had a single negative side effect.
Go to your dr. See what your options are. Don't wait.