Feeling really down...

Im so happy to have found this site because I am really at my witts end with my diabetes.Ive had type 1 diabetes for 13 years and my control has never been too wonderful.I am not petrified about complications and am doing everything I can to stabalise my bg.I have 2 major problems.First of all I dont feel well at all when my bg is at a normal level I start to feel weak and really hungry..like a hypo.Secondly I am in my final year of school in Ireland and I have the biggest exam of my life at the end of this year .I know I am smart but my diabetes upsets everything.I cant concentrate when my sugars are high and I still cant concentrate when they are normal .I cry everyday because I know if my diabetes was in control I could achieve so much.I am in contact with my endo who keepts telling me that the feeling will passs but It isnt passing and Im getting depressed about it.Im really happy for all diabetics who lead a normal healthy life but I am also soo envious of them.Please help me if there is anything you can say.