What could these symptoms mean?

A few days ago, I was cooking dinner talking to my husband, when out of nowhere, I felt really hot, dizzy, and weak. I had eaten breakfast and lunch that day, and I was staying hydrated. Those symptoms hit me suddenly. Today, I got home from my doctors appointment, and suddenly and out of nowhere I felt the same way. Both times, I felt better once I ate something. I am 14 weeks pregnant, and today I went in for a glucose test...but they didn't tell me if my blood sugar was to high or low. All I know is I have to go in again. My mother and father both have Diabetes Type 2. I always get my blood sugar checked and it is always normal (except for today)