my mother in law has said that she had black outs with each of her pregnancies (4).

My dr told me it was normal during pregnancy but who knows its been happening to me since the beginning

it has been happening to me since I was 15 weeks I am now almost 33 weeks, my doctor said it could be that I am letting my sugar get to low and my blood pressure bottoms out and that's when I black out so I regulated my diet to where I don't let myself get hungry or anything and I have been doing pretty good it hasn't happened as much, he said it is very common in pregnant woman.

Ok , i dont have an appt for another 3weeks

might be low blood sugar... but bring it up to your OB. any strange vision changes should be documented and discussed