"You just don't think it. So here I am today," Aniston said. "The ship has sailed." Jennifer Aniston has opened up about her failed attempts to get pregnant, saying she has "zero regrets" about a difficult period in her life. Speaking to journalist Danielle Pergament for an Allure magazine cover story, Aniston recounted how she had "gone through really hard sh*t" in her late 30s and 40s, but it made her the person she is today. "That's why I have such gratitude for all those s—-y things. Otherwise, I would've been stuck being this person that was so fearful, so…