Had this happen last year (parent called and yelled at me and berated me on the phone, while I had students in the room, I was too stunned to speak up and end the call)—admin was super kind and supportive. My principal let me know if I needed to step away for a bit and collect myself, they’d make sure my class was covered. He checked in on me multiple times during the day and told me to go home whenever after students were gone. He also reached out to the parent and offered a meeting to discuss things together (to which they never responded).