Hi, and welcome to the forum!
I understand what you mean, and dont worry, your not he only one. I have a friend who is also a type 1 diabetic and when we were in class the other day, he did his bm because he thought that he was hypo. His bm was 5.8 but he must have had the symptoms bacause his body is used to a high blood sugar, like SarahQ explained.
After i was diagnosed, i was realy scared of my bm going too low that i also had carbs to get it up. I talked to my diabetic nurse about it and i was put onto a different insulin - Novorapid and levemir, 4 injections a day to have better control. Speak to your diabetic specialist about it and she should have a few ideas to help you.
Hope all goes well, Michelle