Are you growing a high-antho ("blue") variety or a variety known for purplish foliage? If not, it looks like you have some nutrient issues based on the purple cast to the leaves.

It could be the nutrient problems, or it could be that it's fairly common for early blooms to drop.

I don't know enough about aerogardens' light output and whether it's sufficient for fruiting tomatoes. I always thought it was more for things like kitchen herbs and greens, not fruiting veg. Maybe someone with more information on that will chime in.