Frequent hunger, thirst, and nausea?

How possible is it that I have type 2 diabetes? I don't have any history of diabetes in my family, although we are mostly over weight. I've never had a heart attack/ stroke and im only 15. My symptoms mainly include the thirst and hunger, but when Im hungry I also feel verynauseouss and feel a very slight burning in my stomach. Lately, and I know this sounds weird, I've been eating oranges and their peels for the health benefits (lowering blood pressure, loweringcholesteroll, fibers, vitamins, ect.) Can this have contributed to mysymptoms?