i found a baby alligator snapping turtle by my lake a while ago. I have had him/her ( to young to tell if its a he/she) as a pet for about 3 weeks now but he started having mood swings today and he lays his head down and wont move at all for a setain peiod of time and it scares me if he/she has an air pocket or disease and posibly could die from it.........so how would i know if he/she does have disease or air pocket? how can i treat it?

The turtle needs to be taken back to the lake where you found it.