Lightheaded and fatigued after eating? GD? 27 weeks

Emily

Yesterday I had an extreme dizzy spell in Target after I ate a scone and walked around for a bit. I got suddenly hot, clammy, and felt like I was going to pass out. I called my dr and she said to eat, rest, and if symptoms persisted go to the ER. Not only did they persist, I felt even worse after eating. So I went to the ER, but all they did was run some tests, which were inconclusive, gave me a bag of fluids, told me to follow up with my OB and sent me home. I was planning on waiting til Monday to call my OB again, but my symptoms came back today. About 15 minutes into my lunch I began feeling lightheaded, while just sitting at our table! It’s been a few hours and I definitely still feel unsteady and definitely lethargic. Does this sound like GD? Should I wait til Monday before contacting my OB again? I’m not sure this is urgent enough to warrant an after hours call, but I am definitely worried about eating now. Anyone have any clue?