Tampon Pain and the Diva style menstrual cups

I used to use tampons, never had an issue. Shortly before having my second son, my IUD became unbearably painful, leading to it's removal. After the pregnancy that inevitably followed, I can't wear tampons without causing my already intense cramping to become worse. After the first 2-3 days, I can comfortably wear them. However, those are like, crime scene heavy days. Pads don't cut it. I'm ruining my underwear and bedding, SO I wake up panicked, worried I'm making a mess. It's miserable. Anyone here have pain with tampons and tried a cup? Is it the same? Or did the cup fit more comfortably?