Losing vision and falling when standing up? Anyone know what this is?

So I am 7 weeks pregnant and recently everytime i stand up from laying in bed or sitting, I first become very dizzy and then blank out in which i cannot see anything at all and my knees get so weak and tingles go through my body. This morning this exact case happened, except I was stumbling in the hallway holding onto the wall and completely collapsed on the floor and banged my head hard on the wall and quickly returned back to normal after a few seconds. Does anyone know what is wrong with me? Is this a part of pregnancy?

I don’t know the correlation between this condition and pregnancy, but it sounds like you’re experiencing Orthostatic Hypotension, which is when your blood pressure drops upon standing. I had that for awhile when I was a kid. I would recommend speaking to your doctor about it.