Welcome! I am an American living in Scotland with my American DH and our 11 month old DD. Congrats on the move and your pregnancy :)
As far as your move goes, does DH's company provide any support/info on the relocation? Ours helped us with some of the logistics regarding what to do with the house and cars. How long will your DH's assignment in Germany last?
We moved our dog out to the UK and went through a pet relocation company. I am not sure about the laws in Germany, but in the UK now it is a lot easier to bring a pet from the US in. (no quarantine period).
There are a lot of women on here and the other board who live in Germany who can offer you great advice.
Another thing I might add is I recently joined an expat group of American women living in my area that has helped me enormously. I would look into something like that in Munich.