Could I have Diabetes ? No one seems to know whats wrong with me D:?

I'll start from the beginning . In April of 2010 , I started to get hungry , tired , thirsty , and urinated . a lott . I kept getting symptoms of UTIs , kidney stones , and all kinds of stuff . My peditrition tested me for Diabetes , but my sugar was only 120 , even though I had eaten over 3 hours before . Because she didn't bother to look into anything else , we switched doctors . I then got tested by fasting , and my sugar was 75-85 [I don't remember the exact number , it was in August ] . In October of 2010 I got Appendicitis , and got my appendix removed . I started to have stomach pains again in November , and had a TON of tests done on me . It was my gallbladder , which I had removed in Feb. 2011 . In April 2011 , I started having the same pains . Again -.- . Last week , I passed out in class because of low blood sugar , but by the time the nurse came my body had shot out the sugar I needed , so it was only 117 . I have been getting SO tired lately again , urination every 30-60 minutes , I feel like I always have to eat , I randomly get double vision (without trying) , and my feet always get numb&superr cold ! I'm sorry this is so long , but can someone please help me ?! I just wanna know what's wrong with mee):