Michelle
Looks like you have a tomato hornworm moth or similar hawk moth( family Sphingidae).
It looks like it either just emerged from the pupa or when it did its wings did not fill out properly. Usually when they emerge from the pupa case they pump the fluids from their body into the wings to fill them out. Perhaps if you watched this one you saw if it was trying to fill its wings or if it was deformed for some reason.
The caterpillar of this moth is probably the one that feeds on your tomato plants.
The adults may be seen flying during the day time but usually at night resembling a hummingbird as they fly.
Here is a website that shows the various stages of your moth.
http://bugguide.net/node/view/3244/bgimage
