Dizzy and Fainting

Nic
Have any of you ladies experienced being extreme dizzy and/or passing out during pregnancy?
I have had two episodes now of this. Both times I was standing and my vision started to go and then I would have fallen over both times if I hadn't been caught. The second time I was standing in line to change my last name at the Social Security office. I had been standing for about 50 minutes in one place and all the sudden I was falling over and this nice older man behind me caught me. It was very embarrassing! 😭