Scared

I'm 22 weeks and my blood pressure has been up at 2 appointments 2 weeks apart. They're having me tested for pre eclampsia and I am terrified. So far every urine test has come back negative for protein, but they are making me collect for 24 hours and then having blood work. I'm trying not to stress about it, but it's hard because it is so scary. Has anyone else gone through this?