So worried and feeling helpless!

HeatheršŸ¼ ā€¢ Baby girl Talia Noelle born 9/3/15. 7lbs, 20 inches long.
So I got pregnant while using an IUD. It was removed. Then I ended up with placenta previa, which resolved. Developed a breast tumor, biopsy showed it to be benign. I thought everything was going well, then yesterday at 29 weeks, I found out I have gestational diabetes, too much amniotic fluid, and the baby has double bubble sign. I'm so scared. This is a whole new level of panic. Has anyone dealt with this or have any advice?