feeling sick

So I'm 27 weeks pregnant . This morning I woke up with hard heart burn. Not only that but I also woke up with a super sore stomach as well. I sleep on my left side so idk if that has something that do with it or not. But my stomach feels like I have a stomach bug or something causing so much pain and nausea. I did eat pizza for dinner last night. I have a glucose test tomorrow morning so I just hope I don't feel this way. Normal ?