Surprisingly, feeling faint isn't all that uncommon in many pregnancies. I've been getting spells lately where I just can't stand up to fast or i'll see white.
Once you start getting bigger and you're body starts adjusting to the new weight that's about to be put on it, you're body could be letting you know it's about that time.
Feeling faint and dizzy is normally signs of your blood pressure but if you're that concerned call your .Drs office and see what they say about it.
Let us know!
Sarah