In my second pregnancy, which we wound up with pre-e, I found it pretty ironic that one of the first weird symptoms I reported to my MFM was that I got so dizzy I had to drop to the floor for fear I was going to pass out- when my hubby took my blood pressure it was stupidly low. I had similar dizzy spells early on with this one as well. Not sure if it's normal or usual, but I certainly had dizzy spells early on.
Hopefully you'll get a call from your doctor soon, as you'll probably want to check in before completely stopping meds if that's the direction things go.
2008-Our Baby Girl, PTL born too early at 30w6d, Fought so hard... Forever Loved & Missed
2010- Lil' Bro, Pre-E at 29 weeks... Induced at 36w6d, Born 37w
2012- Lil' Sis, Super-imposed pre-e at 25 weeks, PTL & GD at 35 weeks, Evicted 36w