The 29-year-old "Born This Way" hitmaker made the admission as she joked with the audience about speculation of a possible pregnancy on stage in Los Angeles, reported Contactmusic.
"I'm getting a little older and many people think I'm pregnant but I tell them, 'I'm just almost 30. Me on the other hand, I'm having a more difficult time with things. A little more here and there." she said.
Meanwhile, Gaga previously admitted that there was a point in her life where she considered having children with her fiance Taylor Kinney.