You are
not stupid or overreacting!

You have every right to be concerned about your health. *hugs*
The symptoms you describe could be due to hypoglycemia. Some health experts believe that hypoglycemia is a precursor to Type 2 diabetes... but not always. Your weight loss could also point to diabetes.
You asked if your symptoms seem "normal", and they don't appear to be so to me. Please see a doctor asap for a complete work-up!
Good luck!