0615_kourtney_EXCDDespite what Kourtney Kardashian may have tweeted, toofab has learned she has NOT gone into labor!

The reality TV star set off a Twitter frenzy Thursday night when she posted a photo of a soda on her Instagram account with the message "Chick-fil-A and a water birth. No big deal."

With her due date quickly approaching, many took the tweet to mean she was ready to give birth last night ... but we're told that's just not the case.

Sources close to Kourtney tell us she did not have her baby yet ... and she was merely doing research on water birth and got a little over-excited with her tweets.

Kardashian is due any day now with Baby #2 with Scott Disick.

She revealed back in February that the two, who already have two-year-old son Mason, are expecting a girl this time.

UPDATE: Kourtney just tweeted, writing "Witnessed a water birth last night with . What an experience! All I can say is WOW!"

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