We never find out the sex in advance either and generally people do seem surprised.
I didn't know DC2's sex for ages. I had a ventouse delivery so after that, stitching,started going a little into shock from a small haemorrhage...I was just happy to hold him and nobody had told me his sex, I didn't even think about it! A doctor came into the room a little while later because the midwife reported my bleeding and asked me the sex and I thought, I don't know!! And opened his blanket to see. It was actually a really nice way to find out!
I had such a good day yesterday with mostly lack of sickness that I forgot to take my afternoon tablet. And thought great and I feel ok! Then was severely ill whilst Eurovision was finished and sooo badly nauseous today. So guess I can't drop the tablet in future sadly.