Passed out

Ashley • 27 year old, dating my husband since we were 15 years old. We've been married since July 26, 2013. We've been trying to get pregnant since October 2015.
So I was out to dinner with my mom and husband. We got thru dinner then I got super nauseous. I excused myself to the bathroom and in my way I passed out. Has anyone experienced this? My mom said it happened to her 2 times during pregnancy.