Worried

I've been having this weird feeling like an horrible empty scraping feeling in my stomach. No matter how much or what I eat it doesn't go away and I get no satisfaction. I called my midwife cause it was starting to worry me. She wants me to go in the morning for a glucose test to test for gestational diabetes and she sounded worried. I really hope I don't have it and I'm really worried about it. I don't want to have to log what I eat and take my blood four times a day! I crave sweets so bad I don't know how I could just totally cut them out! If you're reading this, please pray!