I went and saw my GP to tell her I'm pregnant and she wants me to get an early u/s, for dating and to make sure it's not ectopic or anything. But the thing is, we're going overseas for a week (leaving next Sat) and she wants me to get the u/s before we go, just to make sure it's all okay. But I've read that at 6 weeks, they might not be able to detect a heartbeat. I'm wondering if I should wait till we get back? Then I'll be between 7 and 8 weeks. But then should I be disregarding my GP's concerns? She wasn't worried as such, I've never had an ectopic or m/c or anything, but I do have uterus didelphys (double uterus).

So what do you all think? The u/s will be $280, I don't want it to be a waste! But then, the rest of my u/s will be free as we're probably going public.