I'm really sorry about your string of bad luck. I've had those days/weeks/months. They aren't easy.

As far as the smell goes I mean I would definitely try to find the body but I won't harp on that anymore.
Vinegar(white) is usually really good for eliminating odors and germs. You could also try getting a few boxes of dryer sheets and leaving them in the car to help absorb some of the smell. Also just keep the windows down if possible and let it really air out. There's also a cleaning product called Odo-Ban that is really good for getting rid of odors in different upholsteries. I don't know if any of this will work for you but it's worth a shot.