It's tricky because it is different for everyone. For some it is a slow progression and for others it comes on very quick- one of the reasons it can be so dangerous. I am one of the slow progression folks, at the same time there are many mommas here with very fast onsets.
I'm glad your doctor raised the flag with your increased BP level, especially your diastolic and your proteinuria- which you're right, not diagnostic yet, but higher than folks would want to see, especially in conjunction with the high BP.
What is the plan going forward? While I hope this is all a blip in your pregnancy, I also commend ya for being proactive and learning about the road you might find yourself on- though again, I hope its not the case!
Keep posted when you can and be sure to check out the signs and symptoms and be alert for them. http://www.preeclampsia.org/health-info ... d-symptoms