I know that feeling, and it SUCKS!
I had to wait an extra MONTH for Dora. She was just so tiny, that the breeder wanted to be POSITIVE she would do ok, even though I was a vet tech assistant for years
On the upside, I had 4 more weeks to prepare, AND more time to SHOP SHOP SHOP for goodies for the spoiled princess, BUT more importantly, made me even more relieved to have her!
You will be so happy once you get her, that time waiting will be soon forgotten