None of us here is a physician, but we're long-time diabetics or care-givers for diabetic children
You didn't mention if you've been diagnosed with Type 1
or Type 2, and the treatment options vary for these types.
Your instincts are good, Candikane. Whether you're Type 1 or 2, monitoring your BG (blood glucose) and learning how your BG responds to food, exercise, stress, etc. is very important.