Well, we moved over here (Germany) about three years ago, and I was 20 weeks pregnant at the time. So I know completely about the fears that go along with everything...plus the fears of finding a doc immediately and insurance and whatnot.
Honestly, I'm SO glad that I've had children over here! We actually got pregnant with the second this year, partly because we wanted him to come in Germany instead of the States. The reason being is that the insurance systems in most EU countries are standardized, cover natural birthing/remedies, and are extremely preggo/family oriented. My homebirth will be fully paid for!!! They also pay for pre- and post-natal midwives to come to your house and give you helpful tips about everything from caring for baby to stomach-strengthening exercises. It's heavenly.
And about the language--you will learn what you WANT to learn. If you work to become fluent, there's no reason that you can't be within a few years. If you sit in your house and stay away from the public (which I've done a lot because of newborns and PPD and such), you won't get as much. My suggestion would be to enroll in Volkshochschule (like community college) immediately upon arrival for a German course. After the baby comes, you can maybe still go to the classes, or you could try to supplement at home by getting Rosetta Stone or Berlitz software.
So I say--be prepared to enjoy yourselves. Know that it's hard to make friends here they tend to stick with people they grew up with, and offices aren't usually as "social" as in the US. But there are ways--seek out online forums (Stillen und Tragen is a German MDC), always seem willing to learn about the language/culture, and get out to neighborhood events often. Also, TRAVEL!!! Sooo many beautiful things here!!! Even if you have rough times, you'll discover that it's all totally worth it in the end for the experiences you'll never forget.
Good luck on your move, and with TTC!!