Greetings LADYOWL1974 - glad to have you onboard!
While I'm not a diabetic, my DH is and fatigue is definitely a possible side effect with Metformin. SparkPeople has a number of different diabetic teams that you might want to consider joining for extra support and tips on dealing with diabetes.
Wishing you the best as you work on becoming healthier and more fit!!!
Moving More! Eating Less!
Motivation gets you started, habit keeps you going!