Traveling abroad

Courtney
Hi all,
My husband and I started trying in January to get pregnant.  We both thought it would take us a bit of time, it took my twin sister almost three years to get pregnant, but surprise we're seven weeks pregnant! Very excited about it, but we did have a Europiean vacation planned that will take us away from home for five weeks. I'll be about 18weeks when we leave and 22 when we return.
Anyone have any suggestions for me? I know this is around the time you find out the sex, can we do this abroad? Or wait until we return? I have purchased travel insurance. 
Any and all tips would be much appreciated!