230lmesser021611_02_X17%20copy.jpgHere we go, again.

Reality star of MTV's Teen Mom 2, Leah Messer, is pregnant and engaged for a second time, a source confirms to X17 ... Congrats?

A source close to Leah tells us:

    "The Leah saga goes on … this girl just can't make the right decisions. Unfortunately she didn't learn her lesson with the twins, that being a teen mom is super difficult. It's hard to believe she's doing it all over again and going down that same road again."


The 19-year-old was married to the baby-daddy of two-year-old twins Aliannah and Aleeah for just six months, filing for divorce in April, but she'll walk down the aisle once again with fiancé Jeremy Calvert, in 2012.

Let's hope the second time's the charm!