I would refuse to even begin such an effort. I earned my now. And, my now was made from all the pain and torment I endured. I would not change a thing. If I were forced, I'd suffer every wound and torment exactly as it had been before. I would never change or do anything to risk my now, my 30+ years of true love and devotions, of a life of joy and the future of hope I see in my son.
That said… if I'd been offered the chance to step into the TARDIS and go tooling around the universe with Doctor Who, I'd have grabbed my husand and my son and off we'd go!