I don't think stomach pain is a typical side effect of steroids. What were you on the steroids for? Was it oral, topical or inhaled steroids?
Typical side effects are:
Weight Gain
Glucose Intolerance
Hypertension
Increased Susceptibility to Infections
Bone Thinning
Easy Bruising
Mood Swings/Insomnia
Avascular Necrosis of bone
Abdominal Striae
Cataracts
Acne