I am very rarely off work sick and have never had to get a sick note/doctor's note.
I had Friday and today off as holiday.
I happen to have been unwell since yesterday and feel that I may not be well enough tomorrow to go back to work.
As I said, I'm rarely off sick and I have a vague memory that if you are off for 5 days you need a note. Tomorrow would be the 5th day if I count the two days holiday and weekend (not a normal working day). I don't know if that means I need a note but to be honest I'm not even sure how I'd get to the surgery as I'm feeling dizzy and unbalanced. Can't walk or drive in this state.
Im a civil servant if that helps. I should probably look it up on the intranet but I know I'll see urgent emails/Teams chats and get sucked in.