Passing out

Sami

Has anyone else passed out during pregnancy and what do you do to prevent it from happening? We were at a Christmas party and I was standing for some time all of a sudden I felt hot queasy and my hearing started to go and my eye sight started to turn black I told my husband I was gonna pass out he grabbed me and I went limp he said 30seocnd to 1 minute I woke back up..... I am kinda worried and curious of anyone else experiences