Concur with your comments
I have to agree, Nothing is worse than being in mid-stroke and being interrupted by an over zealous monger with a lack of respect for other mongers. Please do everyone a solid and not show up 10-15 minutes before your appointment, it definitely ruins the moment for all parties involved. I would also agree, you never leave without offering her a tip. I'd contact her, apologize and schedule a time to stop by and drop it off.
Therapist Time Management
Sorry, I don't agree with calling before I enter. Granted, give courtesy and don't show up early, but come on time. If 2 pm is the agreed time, show up at 2 pm. With that said, if 2 pm is the time, MT should have business courtesy and have the place ready by that time. Its NOT on me to make sure monger is cleared out. I expect my table to be ready at a restaurant when I make a res ahead of time. I don't want to call ahead to make sure my table is not being occupied. That would be poor business management on the restaurant. MT's need to manage their appointments knowing that a time was agreed on and have the place ready.