Luckily it was someone from FedEx with my new scanner! I guess doorbells, especially buzZZZzzers, are a pretty easy thing to be startled by, especially when I’m concentrating deeply on work. Of course I still feel better having a real working doorbell than none at all, like in some of my previous apartments. At least now I know when someone is there.
It took a while longer for me to calm down than in my “normal” days (lots of extra adrenaline and my nervous system is still very sensitized!) but once I did I had a pretty good day: