We found out the sex with our first at the anomaly scan, after we got the all clear that everything appeared to be normal, the doctor asked if we wanted to know.
We had really discussed it much before the scan, but me & DH just looked at each other and said yes at the same time so that was that!
It didn't take away from any of the excitement of finally meeting our LO, I would say that personally for me, it made it more exciting- we knew the sex and had a name lined up.
Either way, it will still be amazing as you are going to meet your new baby!
Re the awkward questions from strangers- I think that probably for the first 12 months or so, people will tend to ask if it's a boy or a girl but that's because babies look like, well, babies.
I tended to put my LO in white/neutral baby grows and often people would ask is it a boy/girl but that's just normal, I didn't specially dress them according to gender I could not be arsed to dress them up in gender specific outfits i.e. dress for girls, jeans for boys