| Since you were diagnosed less than 1 year ago i would say that is definitly a major culprit in your problem. Also, going from cold to hot would make your insulin less effective, not more effective. The heat causes the insulin protein to denature more and is thus less potent. I don't know how old you are, but as your body changes (puberty, menstral cycles, etc...) insulin will affect you in different ways throughout your entire life. Eventually, it will stabalize to a relative degree and you will learn how to control it more effectively. The best thing you can do is to check your blood sugar often, and figure out how the various foods you eat affect you. | 
