Pre-E concerns & can't get a hold of doctor or nurse

Lauren
I'm getting a little nervous about preeclampsia. 
I gained 10 lbs over the first 8 months and in the last 3 weeks I've gained 12 more. I know it's normal for weight gain to increase but that just seems like a lot. I've also been super nauseous lately and I'm getting headaches constantly, only on the right side. my bp is 134/94 😕
It's been below 120/80 my whole pregnancy. I've also noticed a huge decrease in urine output so I'm trying to drink as much water as I possibly can and avoiding salt. I have an appt tomorrow morning and can't get a hold of my doctor to ask if I should go in or just wait for my appt. I'm only 36+3 and want baby to stay on as long as possible.