Is Amy pond pregnant

Yes and no, the Tardis scanner showed positive and negative results.

The Amy Pond who has been with the Doctor for the past 9 months has actually been a "Flesh" person. The Doctor disinegrates her and the real Amy Pond wakes up in a strange place where she is fully pregnant. She names her baby Melody. River Song admits that she is really Amy and Rory's daughter, Melody.