Stomach discomfort, body weakness and extreme tiredness, 2 lumps on abdominal area, feeling cold, loss of appetite, testicles are acting weird, weight going up and down?

Varied symptoms: It's doubtful that one disease could explain these varied symptoms. You should be evaluated by a specialist in internal medicine who will take a thorough history&system review, perform a complete physical examination&order appropriate tests in order to make diagnoses. Referrals to other specialists like gastroenterologist, urologist,endocrinologist may be recommended.