Why don't you just do your travel shopping a little closer to your travel plans, just to make sure they still fit when you get there.
This! Every woman shows differently so I would wait a little bit longer and see. I showed quick my first pregnancy. I'm 5'4 and was 113 prepregnancy weight and really short waisted. But at 18 weeks I had a small but definate bump and bigger boobs
about a cup size bigger. I was wearing a belly band and a couple of maternity stuff.