Would my blood pressure be high if I was having miscarriage?

Yesterday I had some spots of blood. I went to the hospital and they did a pregnancy test and did my blood pressure. Test was still positive and blood was normal. I went back today and they did my blood pressure again, this time it was a little low because I haven't been drinking enough fluids and I've been stressing. I have a scan tomorrow, but If I was miscarrying, would my blood pressure be high?