Blood sugar questions

Dana
I called the clinic and they won't see me because I am pregnant. My OB office is closed. Ugh! 
I work graveyard shift and last night something pretty scary happened. I am feeling ok now so I'm wondering if it's safe to wait for the OB to open Monday?
My GTT test a month ago was normal. Last night after a light lunch I was in a patients room when I suddenly felt very jittery. I started sweating really bad, my heart was beating fast, I felt like I was going to faint. I made it back to the lab where I work and a co-worker got me juice. Within about 10 minutes I felt a lot better. This is the first time this has ever happened to me. 
I am 15 weeks 1 day right now. Anyone else experience this? 
Please be kind. Going to the ER is very costly so I wanted to check with you ladies before I run over there for something that could wait.