High blood pressure

Why do I always think of all the questions when I get home from my appts?!!!

I have gestational diabetes that is being managed through diet, which is fine and under control. But yesterday I had an appt with my obs and she said I have borderline high blood pressure so we need to keep an eye on it, also I've blown up over the last week in my face, feet and hands (I was kind of thinking this was normal at this stage in pregnancy...?). Anyway, she said to me if I blow up anymore to come in and get my BP checked. Now I realise that the combination of High BP, GD and fluid retention is a potential risk to developing pre eclampsia but now I'm a little lost as to how to keep a track of any changes. I've suffered with chronic headaches for the last 9 years (which is basically a constant headache that never goes away) so hand in hand with this I sometimes get dizziness and visual disturbances...which from what I've read seem to also be symptoms of pre eclampsia. Has anyone else had a similar experience? I'm feeling a little weird today so not sure if that's just me being paranoid or if it's something to be concerned about.

Has anyone else had a similar experience? And if so did it turn into pre eclampsia? What symptoms gave you the indication? How can you tell if your BP is rising?

I bought a BP monitor and checked it morning and night.