Congratulations, and here's hoping the sickness doesn't last too long.
We kept the 4th pregnancy a secret from nearly everyone until about 15 weeks even though I felt gruesome and almost never managed to keep a meal down. I had had bad sickness,but not bad enough to be admitted to hospital with all the others. So by then I sort of knew how to 'manage' it. I found that everything was much worse when I was tired so I did whatever I could for an easy life. I could eat a little after losing a meal, and I suppose I kept going on that. Ds1 was 6 and was pretty helpful with the others, and I just holed up at home if I didn't have to be chasing round after the dcs.
At 12 weeks we moved to the other side of the world, which was why we hadn't felt we wanted to worry our families with news of the next grandchild, as they were already pretty flappy about the whole thing. It was really horrid packing up our house without being able to say why I felt so rotten, but I think I used some white lie about being anaemic.
Looking back I do wonder how I lived through those weeks, but I remember very fondly the feeling that dh and I and no one else except the midwife knew about our little creation. It was our baby and our business and it was very special to keep it to ourselves. When we came back a year later with a bouncing 5 month old we'd missed a lot of the adverse comments!
Reban, hoping things go well with you, too.