Calls made today, for my records: Zach, the assistant manager at Enterprise. Gave them all the information from the little blue card. Got confirmation that since I purchased the damage waiver, I'm off the hook with them. Still don't know where the car was towed, so I can find out about getting my parking pass back.
Casey, a staff member at my Allstate agent's office. Confirmed that since I was driving a rental car and the other driver admitted fault, they don't need to be involved.
Still need to call: My health insurance carrier.
Will not be going to work tomorrow; my car is still in the shop (I would have sworn the message yesterday said "call if you have questions", but apparently they were expecting me to call with authorization, so they didn't do the work yesterday), and I just didn't want to deal with renting another car.
Oh, and I got email today from both of my managers, both expressing concern for my well-being, and one of them saying that I'd gone above and beyond by thinking to delegate and address my responsibilities under the circumstances!