Period with no cramps?!

I'm 26, been having periods for 14 years. Every single period I've ever had has involved pretty bad cramps usually a couple days before it starts and a couple days of the cycle. This time, for the first time ever, I had absolutely no cramping. What's happening? I took a pregnancy test and it was negative. My period started on the correct day and has been the same flow as usual. Seems too good to be true. Anyone else ever have this happen?