I told my direct boss but we have a really good working relationship and I knew she would be supportive. I have kept it very quiet to her only as I was also concerned about the impact it would have on my ongoing career. I dont know if this will work so I have continued to seek promotions.
On a contract under qld govvie conditions I would probably be very wary too. I would go for female medical issues that will require some day surgery at some point with appointments to prep and follow up. Agree get medical certs without clinic details
Go with your gut feeling. Its usually best!