Flying is fine during pregnancy as long as you keep moving and drink lots of fluids.
I flew 3 or 4 times in my last pregnancy (Vietnam at 3-5wpg, NZ x 2, Brisbane from Melb) and there were no probs. You can fly til 36w I believe with most airlines, and after that they require a medical clearance from your dr.
Most international countries will not let you in after about 24w as they dont want an unexpected new citizen on their hands!

Half your luck on the missing m/s, hopefully you wont get a bout later in your pregnancy!! and its a very hard wait til 12-13 weeks for that first ultrasounds, but what a joyous time it is!

Fi