Hey Sarah - sorry to hear you are feeling a bit blah. I had dizziness just like you explained with my first pregnancy and it was always when my BP was a bit low. I never had a really really low BP but obviously it was low enough to make me dizzy.

Seems like it is good timing for you to be visiting your Dr so have it checked out.

Whenever I felt dizzy or just a bit blah I would go to my local chemist who would do a quick BP test and it would always put my mind at rest and let me now what my BP was sitting at and if I was worried I would then call my ob who reassured me that things were OK.

Hope you feel better soon.
Take care
Jem