Work anxiety has kicked in.

I have had two nightmares about work tonight after a c*ck up that occurred.
I was so embarrassed and upset.
Being given a name of a client and a person to send them to see.
Only for someone different to turn up and give me a different name.
But In actual fact it was for the same meeting.
I did pretty much every thing I should have on my side except offer them a drink.
Because I was told if a meeting room is set up not to offer them a one.
But because he asked for a different person I assumed it was a 1-2-1 meeting where they might go out.
Like they often do!

I did get testy and say I needed to be included in information about meetings.
I was then shown that in actual fact I was clicking on the wrong calendar event to see meetings booked etc. As I didn't have permission to view those!
I personally did have all calendars to view but another colleague my manager hid them as she said it was too cluttered and said the main ones I needed to see was the ones I had on screen.
I don't like doing the wrong thing and now I'm nervous about going into work.