Changing your blog URL- I need your advice!

I have a dilemma. A few days ago I was googling my blog just for fun and I saw that someone has www.thefancyyancey.blogspot.com!! My URL is www.thefancyyanceys.blogspot.com.... this is WAAAY to close to mine. Mine has an S and hers doesn't.

I'm getting a good amount of traffic just through my URL, probably due to pinterest but I really need your advice!

Since that other girls is so close...

Should I change my blog URL to match my blog name?

If you have switched, how did it effect your traffic?

Thank you!!