Possible Diabetes??Teen Diabetics? Adult Diabetics please answer.?

I'm not saying that I have Diabetes, but like I just want to know if I should go to the doctor and get tested for it. About the past year I've been getting like really low blood sugar sometimes. I turn into the biggest monster ever and I feel like I can't control myself from being like angry/moody. Then as soon as I put something in my mouth its like I go back to my normal self. I looked at symptoms online and I noticed that I do pee more than my peers and I've been like that for the longest time. I'm really fatigued on some days, it just like hits me and I'll have to take a nap. I'm only 15, so I think I'd most likely have Type 1. What are your opinions? Also, are constipation and right lower quadrant pain symptoms as well??