Entering third trimester, getting very hungry quickly

Hi ladies! I'd like to get some advice and experience talk. I'm entering my third trimester at 27 weeks. My baby has gotten big enough where she is pushing all my other internal organs upward. I've noticed a sudden drop in the amount of food I can intake, but the issue is that I get extremely hungry easily now when I do feel skimmish for food. I don't know if this is normal. For example, tonight I finished a plate of chicken and rice with a salad and some baked potatoes. This filled the entire plate and I was able to finish the entire plate. About 30 minutes later I felt so hungry that I felt nauseous as if my blood sugar had dropped. I took my Glucose test just a week ago and I don't have gestational diabetes. Any advice?