Are you anemic? I had that with my first pregnancy, after I blacked out they started me on iron pills and it helped a lot.
Yeah I just went up the stairs and got lightheaded to and had to sit. You might also want to get your blood sugar checked. Did you eat anything today?
I just stood up and walked up the stairs to go in my room, and then I just started seeing black and everything was going so fast then I grabbed my bed and sat on the floor... It was weird and scary..
with my first pregnancy i found out because when me snd my husband came back from a short walk, i was dizzy and blacked out, and later on that day we took a pregnancy test and it was positive