I dont know how the weather is over there but if your humidity levels are too low it can cause symptoms sort of like what you are saying. The inner ear membrane starts to dry out and crack if levels go below 25%. That can cause your dragon to run in cirlces, flip on its back and basically act like it is drunk. His head tilted makes me wonder about an inner ear probelm. Try one drop of olive oil in each ear and see if that helps.