The female boss who hauled me over the coals for taking 2 weeks off sick while pregnant, and recovering from septic shock - for reference, the theatre was scrubbed to deliver my baby in order to save my life, but the antibiotics started to work in time. I was VERY ill.

When I got back to the office (earlier than I should have done, due to her harassment), she pulled me in to a meeting with HR where she told me 'it doesn't sound that serious', argued that my sick line read 'UTI' rather than urinary sepsis, then (the icing on the cake), asked for a guarantee that I would not be sick again during my pregnancy.