I just received a work phone call that I didn't expect at all. The person was informing me that they'd completed something. No one has ever called to follow up on said thing, and I also don't work on weekends, so I thought they were bringing it up because something had happened. I said, "What about it?" and they explained that the form says to call after completion. I forgot about that. Basically, they were being very thorough and I then responded that "no one has called about that before but thank you for letting me know." I'm happy they followed up but I was genuinely confused, and immediately realized that my confusion/surprise probably came off the wrong way in the tone of my voice. I feel really bad. One of my worst anxieties is accidentally upsetting someone, and I'm currently having an anxiety attack over this.