I'm 16.5 weeks pregnant and for the last week I will get this thing where my vision goes blurry (badly, can barely see a thing), feel dizzy, extreamly weak (can't feel my legs etc... Sorta feel outta body iykwim). It will just come on out of no where without any warning... Usually the only way I can get rid of it is to lay down on the spot and close my eyes (bit hard if I'm not at home, I just have 2 try and make it to a seat). This morning it happened while I was driving, I had to pull over straight away.