Gestational Hypertension Test??

Rebecca • 18 years old first time mom
So I'm 36w5d and yesterday at my doctors appointment I got my blood pressure checked and she said it was elevated, so I have to go back on Monday and be tested for gestational hypertension. The only good part about this is I will be delivering my son sooner. When you have high blood pressure at least once, is it always going to stay there?? Or does it go away once you deliver?