The baby could be sitting on something that i s making youfaint . My doc toldme mine is sitting on smething nd if I feel dizzy or fain t to lay on my leftside.Goodluck an d they may not know bc its not always easy to know.
I am so sorry to hear about you blacking out.
test for iron and your blood pressure. you might be anaemic or your blood pressure might be low.
Hope you get sorted soon so that you can fully enjoy your pregnancy!
Anemia can cause that...when i was pregnant i developed anemia, i was always cold and weak and just had no energy and did pass out a few times.