Fainting feeling

Twice now I have had these “episodes” where I start to feel very clammy, overheated, nauseous, and faint. I start seeing spots and everything seems to narrow. The first time it happened I was at work getting shift report. I had breakfast shortly before and drank water. I sat down and after about 10 minutes it seemed to pass. Today I was sitting at the hair salon when it happened. I also had at breakfast. I didn’t have much water this time but I went outside and got some fresh air and it passed after awhile.

I checked my blood sugar tonight, about 6 hours later and it was 122. I have my Gestational Diabetes test in the morning. I’m just curious if anyone has had these symptoms? I’m 28+5.