Fainting?

Erika • Going for #2!
Have any of you ladies had problems with fainting or almost fainting during your second trimester? I am 99% sure I'm eating enough (I eat every time I'm hungry), and I tried wearing compression socks but didn't notice a difference. I'm getting tested for diabetes Friday but eat pretty healthy so I'm not sure how the results will come back (I didn't have diabetes pre-pregnancy). 
Have you experienced this??