I had a similar experience I was at my physiatrist and when I had a block she tried to finish my sentence that irritates me the most and I told her in a friendly way to please stop finishing my sentences she said ok but when I had another block she finished my sentence again she did this 5 times in under 20 minutes I got so angry that I stood up told her to fuck off and I just walked out. I may overreacted it a bit too much but I was going through a rough time.