Problem solved! So this is what i did... i entered with an alt and found myself. It was a private property and restricted area. I was flying and flying up and didn't stop. So...i remembered the exact spot, logged out and tried to login with my main avi, the one with the problem. I logged on an empty land under water (protected land) after 30 times of trying or more, i didn't count, and went with my avi to meet myself. When i reached close by, my ghost vanished.
Thank you again for all your information!