That is why I am on an IUD. I didn't have the cramping, just long drawn out periods. It seemed I was bleeding more than not.
I was examined and I had one of those procedures where they snip and check to see if it's anything serious. In my case, it wasn't. I was getting anemic and it was more just a pain. On my IUD I get several days of just spotting now - that's it. I don't use it for birth control - purely to have shorter periods. I've had no side effects.
My sister, my best friend and a neighbor are all on IUDs for the same reason.
This happened in our 40's. After children.
My mother had cramping, heavy periods (where she couldn't leave house) in her 30's after she had us. She ended up having a hysterectomy. She had fibroids. Not sure if they would do that today.
I'd definitely ask about it. Might be nothing but the earlier you address, the better. At the very least, if there's an option to reduce it so it's not such a pain, worth checking out.