My RE gave us a 50-60% chance with DE, and we got pg on the first try with a single 5-day blast. I'll admit that having some frosties as a "plan B" was very reassuring, but the 2ww was still agonizing. Even as the pregnancy has progressed, I can still hardly believe it's happening, because we had so many disappointments before we went to DE. Infertility sort of trains you to expect the worst, doesn't it?
Anyway, Maggie, my fingers are crossed for your success!