Chris Brown & Karrueche Tran -- I'm NOT Having His Babies ... Yet

Karrueche Tran is madly in love with Chris Brown ... but he's high if he really thinks she's ready to be pregnant with his kid, TMZ has learned.

Sources close to Karrueche tell us ... she was flattered by Chris' Instagram for Woman Crush Wednesday -- when he posted a pic of her saying, "Need to have this baby and stop playing!" -- but she's nowhere near ready to be a baby mama.

We're told ... for now Karrueche is career-centric -- she wants to be an actress.