Are you overreacting?
In a nutshell, yes. Your competition will copy off you or just use similar phrases, that's part of the game. Does it suck sometimes? Sure but no one said life is fair.
You're a gorgeous young lady with a lot of potential. Surely you must realize that "I got what you need" is a common phrase that a lot of ladies will end up using again and again? Now, I've never met you but I've read several NCNS threads about you and your latest reviewer gave you a "Hell No" recommendation. It might behoove you to focus on that rather than worry about some ladies copying your phrase on ISO threads. Not trying to put you down but by creating these kind of threads and then bumping them like you did today, you're calling attention to yourself and that's not always a good thing. Best of luck to you. No one is perfect and we should all get a chance to redeem ourselves and rise beyond our mistakes.