High BP, negative blood test results?

Katie • Veggie mama
I'm 35 weeks pregnant exactly. My blood pressure was high at my last prenatal visit. my doctor got my blood tested to check for any kidney or liver issues and nothing, so she said I was fine, just stressed/nervous, which I was. Now I went in for a non OBGYN appointment (allergic reaction to deoderant) and my BP is high AGAIN. They tested 4 times, always high. I'm seeing my OBGYN this afternoon. Anyone else hear of anything like this? What on earth could it be? What happens if it comes back high again? I'm freaking out!