I hope it's not cramps and that it's something better!
But if it IS cramps, it doesn't mean you'll be having them every month. I struggled with cramps since I'm 12, (I'm now 32) and in the past 12 months my cramps have been a lot less problematic. I have no idea why. Some months I don't have any, and other months the cramps are so bad I'm in bed for 2 days.
The bcp is known to reduce cramping, so who knows, it could be related to that. But there are tons of possibilities: it could be related to stress, how much exercise you did in the past few weeks, what you ate, or the planets aren't aligned properly, go figure.
We women are very complicated creatures when it comes to our hormones!