I am just peeping in from a different Forum, and wanted to say welcome and congratulations!
There is a reason this little one is on his/her way, I'm sure!
Relax, be thankful and excited, and maybe discuss with your doctor that you are NOT terminating, so...if he would kindly guide you to the best health for you and your new little one. Give your current doctor a chance, since he knows you and your health, but if he isn't willing to help, you have to go with what you feel is right. Explain, especially since you didn't do this "on purpose". If he's not willing to be helpful, then I have heard that a doctor that is pro-life is usually educated in helping in circumstances like this.
Along the note of your fiance' being deployed, my thoughts and prayers are with you! Been there and know the route is rough at times.
My small understanding of Lupus , I do believe it is important to be as little stressed as possible. Try to delve into the excitement of the new little one and put the other thoughts aside.
remembering you, and lifting your family up -