Kris Humphries Ex-Girlfriend Myla Sinanaj -- I'M PREGNANT!

Kris Humphries may not be the sharpest tool, but he sure is potent, because TMZ has learned his ex-girlfriend, Myla Sinanaj is PREGNANT.

Sources directly connected with Myla tell us Myla confirmed Monday that she's 3 months pregnant and says Kris is definitely the father.

This could be used in Kris' divorce with Kim Kardashian, because Kris has claimed he was devastated by the break-up and suffered emotionally. This development further cements the fact that Kris moved on quickly.

We're told Myla plans to have the baby but wants to raise it alone, because she believes Kris has betrayed her by talking crap about their relationship.

But here's the rub ... We're told for the past 3 weeks, Kris and Myla have been communicating regularly.

Oh yeah, here's the other rub -- she hasn't told Kris yet.