Dexilant during pregnancy

Rachel
I am currently taking Dexilant to control my GERD and acid reflux. My doctor advised me to not take it during my first trimester since it is a category B drug. I am very afraid to go off of it- my GERD triggers asthma and if I have an asthma attack, I will have to take a whole bunch of medications and steroids. Does anyone have experience with Dexilant during a pregnancy