I am so glad you decided to get the earrings. You will love them and what a gorgeous set! If you can get both, I would do both the earrings and butterfly ring. I was in a similar situation as you.. I got the Lotus ring recently after I purchased Frivole, and I am really glad I did.
But after you get these two pieces... that's it!

I said the same thing to myself after getting a bunch of stuff recently. One important thing I tell myself... The fun of collecting jewelry is not buying everything at once.
The fun of collecting jewelry is pacing yourself. To enjoy your recently acquired pieces, but to also dream & plan wisely how you want to build to your collection.
So... I vote buy the Frivole earrings and butterfly ring now!
Then, control thyself, enjoy your new pieces, and start dreaming & planning again.
It will be twice as fun.
I am so happy for you! Congrats in advance!