I have problems with my blood sugar, Please help?

I have a meter and I began feeling a tiny bit weak and shaky at 9:06, checked my blood sugar and it was 86. I ate something then I felt even worse and much more shaky when I finished eating, so I checked my blood sugar again and it was 100. Then about 10 minutes later I felt better and I wasn't shaky anymore and my blood sugar had went back down to 89. I don't understand why I felt worse when my blood sugar went up.. I'm not sure if that means I am diabetic, hypoglycemic, or what.. Please Help me out.. Thanks!