First...congrats on your pregnancy!
Travelling? If I were you I will pass...
People say it's safe to travel by air in the 2nd trimester. But it's always less oxygen high up in the sky (not like it's going to cause harm but still). Air is dry too.
And also you may want to get doctor letter to be exclude for the x-ray body scan.
Yeah my pregnant friend went to Hawaii ... It's sure relaxing...but for people who do not want to go for water activities, I guess it's not a perfect place?
The other thing is you are not supposed to take some medication la...I heard that you can't have flu/cold meds over the counter unless approved by doctor. So getting "sick" is a hassle. So I wouldn't want to go to crowded place like HK.