Feeling worried everyday

[vanadio]

I know that i've been posting a lot, but i really need to talk...

I dont know what to do more. I feel worried everyday because os this muscular/fat change in my body... I just think that i have a serious disease and that i will die in some years. I'm so young and i would like to have a normal life, but i have the symptoms for more than 3 years, everyday, all day... The doctors say its anxiety, but i dont know...