Among the many, many reasons I didn't ever consider breeding my Sophia the top of them was this: I did not want to risk
her life. She means the world to me. Sounds like your girl does too.
Instead, when the time was right, I bought my Peyton. Now, I can't imagine loving any other puppy more.
Your next dog does not need to be related to your current dog. For me, the risk of losing my Sophia would just be something I could not stand. Especially if I caused it with breeding her.
Good luck to you. I hope you make a wise decision.