The 45-year-old actress opened up on the 'exhausted' subject of her having children, admitting she and her fiancé are working on it.
She said: "It's want. We're doing our best." She added that the prospect of starting a family makes her feel "nervous".
The former Friends star is adamant something great is coming her way, but it might not be a child.
She told The Hollywood Reporter: "There's something bigger I'm interested in doing. It could be more work, it could be more creativity, or getting more philanthropic in the world. It can look like a baby.
"It can look like a foundation. I know I have a bigger purpose. It's a puzzle, and I haven't quite put the puzzle together. But something greater is calling out to me."
Jennifer also opened up about her struggle with dyslexia. She said: "I thought I wasn't smart. I just couldn't retain anything."
It wasn't until she was in her early 20s that she was diagnosed. She added: "The only reason I knew [that I had it] was because I went to get a prescription for glasses.
"And I had to read a paragraph, and they gave me a quiz, gave me 10 questions based on what I'd just read, and I think I got three right.
"Now, I had this great discovery. I felt like all of my childhood trauma-dies, tragedies, dramas were explained."