I just found I have preclampsea. I go to Dr tomorrow for my regular check up/ to set up delivery. How soon do they try…

I just found I have preclampsea. I go to Dr tomorrow for my regular check up/ to set up delivery. How soon do they try to deliver you? Normal levels are 80 and under, mine are 346. I'm stressing to the maximum!! Please let me know if any of you have gone through this.