Hi, my BP the other day was 110/68 (I think, might have been 60, DH can't remember either) and my OB said that was a great BP. But I haven't been feeling faint. In my first pregnancy, my BP was fine, a bit higher than it is with this one, but I fainted a little bit, and it was because my blood sugar was too low. So you might be feeling faint because of blood sugar levels and not BP maybe? If you are worried, getting a second opinion never hurt anyone :-)