Marylen,
Why did you not apply for your visa in your maiden name using your old passport ?
You can still apply for a visa before giving birth, but you wont be allowed to fly after your 35th. week of pregancy. Flying whilst Pregnant
Pregnant women need not be restricted from flying. Most airline permit pregnant women to fly until the end of the 35th week of pregnancy, whereupon expectant mothers are strictly advised not to fly.