It sounds like ovulation occurred 2 weeks ago and now she is entering her pre-lay shed. It’s typically 30 days (give or take) after this you should see some eggs. The eggs will pass whether they are slugs (unfertilized egg) or viable eggs with life inside. Did the vet by any chance measure the follicles during the ultrasound? Ovulation occurs when the follicles are around 40-45 mm in diameter (roughly the size of a golf ball). Have you tried palpating? This method is very helpful as they near the lay date. Fertile eggs will feel soft, squishy, and marshmallow like while unfertilized eggs will feel hard.
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