How to undo something on Sims mobile

[nakki77777]

How do you undo something on Sims mobile. On my Sims game it kept asking for me to retire my main player, but I clicked no many times. But once it popped up I accidentally click to retire and now I completely lost my player. How do I undo it or get her back?  I worked really hard with her and spent  some of my money on her. So I f you have any idea on how to get her back! please comment and tell me because I’d love to know.