Hi - I was working abroad from just after I found out I was pregnant till I was 15 weeks in - I took folic acid and vitamin D (these are the essential early pregnancy vits, and you should keep taking vit D throughout, according to my midwife), and iron (but that was because I knew I was a bit anaemic, not specifically to do with pregnancy). I did a fair bit of worrying, but I don't think it'd have made much difference whether I was abroad or at home, to be honest! The only important thing I missed was the 12 week scan (they did one at 15 1/2 weeks, and I had the quad test for Down's, which is the one you can have if you miss the window for the nuchal translucency thing). If you can get in touch with your doctor's surgery at home and arrange an appointment for as soon as you get back, that might give you the peace of mind you want.
I guess my reassuring words are probably that I found early pregnancy messed with my head a bit, but that being at home wouldn't have made any difference - I had some problems with bleeding very early on, and all the info I found was that there wasn't anything much that could be done, wherever I was, so in a way being away from all the doctors and just having to get on with it and hope for the best was the only thing I could do in the end!
Oh, and that thing about taking it easy if you feel tired - do! And the hormones can make you worry a lot more than you need to. But you sound like you're with your partner anyway, so hopefully that will help.
Good luck with it all, and enjoy your trip!