Selvester molted about 2-3 weeks ago his shell hardened fine and he surface molted. Well since then he has become very agressive he used to be calm and shy and friendly. Not you pick him up and he pops out and trys to pinch you. He also hasnt eaten anything or drank anything in almost 4 days. We tryed putting him back into the main tank about 6 days ago and all he did for two days was curle into his shell and sit were we left him. So i picked him up to see if he was ok and he popped outta his shell trying to pinch me again. So we put him back into iso and have been monitoring his food and water very close and he hasnt eaten anything or drank anything still all he did was move into the corner and curle into his shell. then last night he started chriping and just kept chirping and we dont have anyone else in iso. Also during his molt he lost a leg. I hope someone can help me with what might be going on.