I have had my iguana 3 months. He was so full of energy and loved me to hold him. 2 weeks ago he became limp. He formed a huge lump on his back between his hind legs. He has lost alot of weight. He has no energy. He can not even eat. It breaks my heart to see him like this. I did everything right, food, heating, bathing and vitamins. Is this normal? What can I do to make him comfortable? Any suggestions?