Have any of you ever changed your blog name?

Ok so a little while ago I wrote and asked you guys for help.  I want to switch to a custom domain but am having some trouble deciding on the name.  Diaryofastayathomemom.com is not available plus I am not really sure how much longer I will be a stay at home mom.  My son will be in Kindergarten in a year and I plan on finding a job, so the title won't even fit me anymore, but do I go as far as change the whole title of my blog?  Have any of you done this?  Do you regret it?  Agnesrhodes.com IS available, but I think it is harder to remember since it is not the name of my blog. 

I'm still battling this back and forth, I would hate to lose my readers because they can't find me or because they think I'm a different blog.  I chose the name when I first started blogging and had no clue what I was doing, now I wish I had thought longer about it.