Diagnosed as hypoglycemic, Could this also be diabetes?

Okay, so about a month ago, I was diagnosed as hypoglycemic. So I bought a meter to keep track of my blood sugar. I'll get the usual readings of hypoglycemia, but i'll also get readings that are higher than average, such as around 140, and once 200. I'm always hungry and thirsty, and im constantly irritable towards people and very emotional towards things. I'm a 16 year old female, if that has anything to do with it.