Is it normal?

Every time I get a period the cramps get worse. When I first got it (4 years ago) I had no pain whatsoever, and then it started to get uncomfortable (like needing the toilet badly for a number 2) and now it gets bad enough that I have to stop talking or bend over to clutch my stomach. I worried that it'll get really bad, I was so happy at first, I thought I was one of the girls that don't get cramps, but it's like Mother Nature wanted to fool me into a false sense of security. Have any of you guys had this? Will it get better or worse? If it gets worse what should I do?