The picture didn't come through for me but if it's where you can feel an egg, it would be slightly toward the lower breast area.
My first comment would be that I would find another avian vet immediately. Your vet's response, in my opinion, is comparable to a doctor telling his patient to "take two aspirin and call me in the morning" when the patient might have an immediate crisis. Diagnosis cannot be made sight-unseen, as far as I'm concerned.
I'm not a vet but I would at least recommend that you separate these two into side-by-side cages -- at least until the feathers have had a chance to grow back in and the thoughts of another clutch of eggs has passed for the time being. Be sure that they both get a really nutritious diet of veggies and fresh fruit in addition to seed and other good people food, 12 hours of uninterrupted sleep at night, and some supervised play time together when it's convenient for you. Check the female frequently so you catch the beginnings of any infection early, and be sure that she doesn't already have an egg that may have become bound inside.
And last, but not least, I urge you to find an avian vet who takes more interest in your concerns than the one you spoke to. There's bound to be one out there who is happy to share his knowledge of the situation with you. Let us know how this turns out, please.