I am so sorry that you are suffering so badly with those headaches, weakness, and bad feelings. Just some thoughts:
My doctor wanted me to go to the LD if my blood pressure was over 160/100. You said your diastolic number was over 100, so if it were me, I would go to LD so that they could do blood work and your urine test there.
Unfortunately, pre-e can sometimes be a quick moving disease, so time can be of the essence.
I also suffer from anxiety, and when I feel detached from my body, I am having a panic attack.
I hope you get some answers soon.
Keep us updated and we are here for you.